Crystal At Trade Prices. Free Delivery - Click & Collect - Free Return Contact our expert advisers today on our benzene monitoring options. Monitor benzene in the workplace with the UltraRae 3000 benzene specific monito Did you scroll all this way to get facts about crocidolite crystal? Well you're in luck, because here they come. There are 19 crocidolite crystal for sale on Etsy, and they cost $52.86 on average. The most common crocidolite crystal material is gemstone. The most popular color? You guessed it: brown The Mineral riebeckite Riebeckite forms in two very different habits. The darker-colored forms which are individually crystallized are generally of igneous origin, such as volcanic rock and pegmatite s. The finely fibrous variety, known as Crocidolite, usually originates from altered metamorphic rock s
4.34 Transmission electron microscope (TEM) image of crocidolite. A hypothetical perfect crystal has an ordered atomic structure with all atoms in the correct places. As pointed out by C. G. Darwin in 1914, such crystals cannot exist. While a crystal may look perfect on the outside, atomic structures always contain some flaws, called defects Crocidolite (blue asbestos) was commonly used to insulate steam engines. It was also used in some spray-on coatings, pipe insulation, plastics and cement products. Anthophyllite asbestos contaminates some talc deposits. Anthophyllite was used in limited quantities for insulation products and construction materials .J. Reynolds Tobacco Company). Blue asbestos was also used to similar effect, and hazard, in early gas masks
Chrysotile is an excellent stone for supporting honesty and sincerity with the energy of resourcefulness and integrity. In crystal body layouts or healing grids, Chrysotile is an excellent tool for accessing and connecting with your power animal. For Gaia Healing, Chrysotile may be placed in an area of disturbed Earth energy Chrysotile, the most abundant form of asbestos in industrial applications, occurs naturally in fiber bundle lengths ranging from several millimeters to over 10 cm. Chrysotile was the predominant fiber type in use in buildings. Other uses include paper products, paint and caulking, textiles and plastics Crocidolite; Tremolite asbestos; Actinolite Asbestos. Actinolite asbestos is generally dark in color and has sharp, needle like fibers that when airborne, can be easily inhaled. Actinolite is made up of other minerals including calcium, magnesium, iron, and silicon. Actinolite was previously used in products such as cement, insulation materials.
.There are six types, all of which are composed of long and thin fibrous crystals, each fibre being composed of many microscopic fibrils that can be released into the atmosphere by abrasion and other processes. Inhalation of asbestos fibres can lead to various. The model described below conceptually attempts to bridge the gap between toxicity and carcinogenicity of mineral fibres and has several implications: 1) it provides a tool to measure the toxicity and pathogenic potential of asbestos minerals, allowing a quantitative rank of the different types (e.g. chrysotile vs. crocidolite); 2) it can.
Riebeckite is a moderately hard mineral with a glassy lustre. It forms prismatic crystals that are dark blue or black in colour. A fibrous variety, crocidolite, is of metamorphic origin and is commonly called blue asbestos. The mineral is associated with acidic igneous rocks such as granites and syenites. Common deposits are found in Arizona. Royalty-free stock illustration ID: 118616770. Riebeckite, crystal structure. Crocidolite or blue asbestos is the fibrous form of this mineral and is believed to be the most hazardous type of asbestos
Crocidolite asbestos is decomposed at around 1050 to 1100 °C through a complex reaction path involving iron oxidation (Gualtieri et al., 2004), which leads to the formation of pyroxene (NaFe-Si 2 O 6), enstatite (MgSiO 3), hematite (Fe 2 O 3) and cristobalite (SiO 2) Crystal structure of riebeckite. crocidolite or blue asbestos is the fibrous form of this mineral and is believed to be the most hazardous type of asbestos. color coding: large gold - iron (fe); gray - silicon (si)/ aluminum (al); blue - sodium (na); red - oxygen (o); brown - lithium Geology/HistoryPietersite is variety of Chalcedony considered a relation of Tiger Eye. Unlike Tiger eye which is a macrocrystalline Quartz variety Pietersite is a Chalcedony with a mixture of Quartz & Mogonite embedded with Amphibole fibers of Riebeckite in the form of Crocidolite. It has similar properties as Tig Get a Free UK Delivery on Eligible Orders. Get Your Newest Electronics Now A curious example of Crocidolite (also known as Blue Asbestos) from South Africa, this specimen consists of a sharp, blocky group of Crocidolite crystals in minor association with Pyrite. The crystal is dark blue and exhibits a sharp cat's eye effect
Crocidolite is a fibrous blue mineral belonging to the riebeckite family of amphibole silicates. It is considered to be one of the several forms of asbestos. The transformation of hawk's eye begins as quartz slowly becomes embedded between the fibers of crocidolite, eventually completely replacing it while retaining the fibrous shape of the. Crocidolite is a blue fibrous asbestiform sodic amphibole, which occurs in the iron formations of the Transvaal Supergroup in the Griqualand West region of the Northern Cape. Pseudocrocidolite is a chatoyant golden-yellow fibrous quartz with included subparallel altered crocidolite fibers, known popularly as tiger's eye, commonly interpreted. The crystal's composition contains a compacted quartz mineral called crocidolite. Ultimately, quartz overpowers the crocidolite leaving behind quartz streaks that make up the golden stripes across the stone
Known for its powerful vibrations of pure love, the Rhodonite crystal healing properties are an excellent remedy for calming frayed nerves. The Xanax of crystal healing, the Rhodonite replaces anxiety, fear, and anger with warm and fuzzy emotions like self-worth, wellbeing, and stability, all the characteristics that make you feel like the real. Tiger's eye is thought to be an intergrowth of crocidolite and quartz. Overtime the crystal oxidises which causes it to become brown. Tiger's eye was a popular crystal in ancient Egypt and was often used to make scarab shaped amulets which were thought to offer the wearer protection The 9 Deadliest Minerals We've Ever Mined. Andrew Tarantola. 9/26/14 9:00AM. 85. 18. Precious minerals make the modern world go 'round—they're used in everything from circuit boards to tableware.
Crocidolite, and; Tremolite asbestos; as legally regulated forms of asbestos out of the group of asbestiform minerals. Asbestiform minerals are defined as crystal aggregates displaying these characteristics: groups of separable, long, thin, strong, and flexible fibers arranged in parallel [ATSDR 2001a] . Rather than replacing crocidolite, the quartz forms a vein alongside it. As the iron in the crocidolite oxidizes, it develops the brown and gold colors that tiger's eye is known for This crystal is favoured by men and children but it can be a bit like marmite for women. Keep it out of the bedroom. Chakra - Sacral, Solar Plexus, Root. Science - Tiger's eye forms when Quartz takes over Crocidolite, a fine fibrous type of asbestos (harmless in this form) material that creates the bands of colour. Dissolved iron from. A polymorph is a material that has the same chemical composition, but a different crystal structure. Crocidolite is the second most common amphibole asbestos mineral found in materials. It is actually the hydrothermally formed fibrous variety of the mineral Riebeckite. Riebeckite is a blue mineral that is a sodium-rich amphibole A member of the quartz family of gemstones, pietersite is a pseudomorph of quartz. A pseudomorph is one mineral that changes into another. Pietersite started as the mineral crocidolite--one of several minerals such as tigereye--which belong to the riebeckite family of amphibole silicates. Over time, quartz gradually replaced the crocidolite fibers
Besides specific surface and surface chemistry, crystal curvature can explain why crocidolite and amosite fibres yield similar protein adsorption profiles whereas that of chrysotile was distinct and why much less protein was adsorbed on silica than asbestos (Nagai et al., 2011) Tiger Eye. Strength Balance Creativity Intuition Protection Prosperity Balancing Polarities Longevity Creating Your Own Reality Luck and Good Fortune. Science & Origin of Tiger EyeTiger Eye is a variety of Quartz and a pseudomorph (meaning false form) replacement of Crocidolite. It forms when Crocidolite has its chemical fibers replaced by sil. A basic concept behind the crystal structure is the unit cell. It is ordered in a structured manner with a repeating pattern. An interesting fact is Diamond is considered the hardest crystal and Crocidolite is considered the dangerous crystal. The ions inside the crystal must be equally charged or balanced
RIEBECKITE - var. CROCIDOLITE, quartz. Outjo, Outjo District, Kunene Region, Namibia. weight: 95 g Blue Tiger's Eye Meaning. Sometimes called Hawk's Eye, Falcon's Eye, and Silicified Crocidolite, Blue Tiger's Eye is a unique stone with a signature luster. The stone is typically gray or dark blue. However, bands of reflective green, silver, and gray create an eye-catching finish. This is a chatoyant stone that belongs to the Quartz. . Look deeper into a situation to see the truth that lies behind the facade. Be prepared for what is revealed and know that it is for your highest good Introduction to Tiger's Eye Tiger eye stone is a member of the quartz family. Its fibers are formed by the common rock-forming mineral hornblende (usually subspecies crocidolite) embedded in quartz. This silky blue-black crocidolite fiber makes the quartz in which it is in blue-green brilliance and forms a kind of stone called eagle eye stone. Tiger's Eye Meaning and Healing Properties.
Pietersite belongs to the large family of quartz gemstones.It is composed of both tiger's eye and hawk's eye. Pietersite is a pseudomorph of quartz, which means that it started its life as another mineral, crocidolite, but over time, quartz replaced the crocidolite fibres.Crocidolite is one of several minerals which belong to the riebeckite family of amphibole silicates.The quartz family. but crocidolite and amosite (asbestos grunerite) were also added to many products. on all the crystal axis are called equant (e.g. grains of salt) but the asbestos is an example of a particle formed from unequal growth along one crystal axis, to form an elongated particle (fibre). Asbestos fibres are regarded as being at the extreme end o
(crocidolite), tremolite asbestos, and actinolite asbestos. Usually, the term asbestos is applied only to those varieties that have been commercially exploited (1, 2). That does not preclude the occurrence of other asbestos-like minerals, however. Magnesioriebeckit Even for crocidolite, most of the observed fibres are uncoated as coated fibres are about 5.7%. Asbestos bodies do not form on erionite fibres. The crystal habit, crystallinity and chemistry of all fibre species do not change with contact time, with the exception of chrysotile which shows signs of leaching of Mg Hawthorne F C , The Canadian Mineralogist , 16 (1978) p.187-194, The crystal chemistry of the amphiboles., VIII. The crystal structure and site chemistry of fluor-riebeckite Physical Properties of Riebeckit We investigated the mechanism and possible significance of this deposition by testing the hypothesis that oxalate generated through nonenzymatic oxidation of ascorbate by asbestos-associated iron accounts for the deposition of the crystal on a ferruginous body. Crocidolite asbestos (1000 microg/mL) was incubated with 500 micromol H(2)O(2) and. crocidolite, amosite, anthophyllite, tremolite and actinolite, which are amphiboles (4). Exposure to asbestos, including chrysotile, causes cancer of the lung, larynx and ovary, mesothelioma (a cancer of the pleural and peritoneal linings) and asbestosis (fibrosis of the lungs) (5-7). Exposure to asbestos and its impact on publi
Crystal lattice plane spacings are a good test of electron microscope stability, and provide an internal reference standard for magnification calibration. Asbestos crocidolite Plane spacing 0.9nm and 0.45nm. The 0.9nm spacing (020) will be found along the axis of the asbestos fibers. The 0.45nm spacing (021) appears at an angle of about 60° in. Tremolite exhibited a remarkably different behaviour upon leaching with respect to crocidolite mostly due to their different crystal chemistry, that is the presence of Ca and Mg (instead of Na and. Rutilated Crystal. Mostly found in Brazil and Madagascar, rutilated crystals or red schorl come with an interesting formation. Rutile or titanium dioxide can be seen as needle-like threads in the so-called angel's hair quartz or golden rutilated crystal.These inclusions may be black, silver, or red-brown in color While quartz typically forms prismatic (elongate, prism-like) crystals, in tiger's eye the original fibrous habit of crocidolite is preserved. The names of crystal habits are derived from:  Predominant crystal faces (prism - prismatic, pyramid - pyramidal, and pinacoid - platy) Crystal forms (cubic, octahedral, dodecahedral This stone is formed in part from the mineral crocidolite, which is a type of asbestos. During the formation of tiger's eye, crocidolite is completely replaced with quartz and iron ore, so if you ever wondered whether tiger's eye is dangerous - well, it isn't
commercially important asbestos minerals namely chrysotile, crocidolite, and amosite and to mention in passing three other varieties - anthophyl- lite, tremolite, and actinolite. Chrysotile. Chrysotile or white asbestos is the most common variety, ac- counting for over 90 per cent of the world's usage. There are extensiv Species: RIEBECKITE var. Crocidolite Locality: Hurricane Mtn., Conway, NH Specimen Size: 2.2 cm field of view Field Collected: Leroy Grant -1970's Catalog No.: u2371 Notes: Mat of blue crocidolite on smoky quartz crystal with astrophyllite Like amosite, crocidolite ground for 30 s shows a prismatic rod-shaped crystal habit and high crystallinity with some fibres that can also reach a length of 30 µm (Figure 8g). However, after grinding for 5 min, fibres longer than 3 µm are rare (Figure 8h)
The crystal structure of chrysotile, its higher flexibility, and interfibril adhesion (3) allow for a variety of intermediate shapes when fiber aggregates are subjected to mechanical shear. Amphibole fibers are generally more brittle and accommodate less morphological deformation during mechanical treatment Asbestos. Asbestos is a commercial term that includes six regulated asbestiform silicate (silicon + oxygen) minerals. Because this group of silicate minerals can be readily separated into thin, strong fibers that are flexible, heat resistant, and chemically inert, asbestos minerals were once used in a wide variety of products tionsintheBandTsitesweredetected.TheX-rayspectrumof tremolite revealed that Al was substituted for Si and traces of Fe2+ replaced Mg in the Csite. Within the group of. Raw Tiger Eye. $14.00. Tiger Eye gives off a strong solar energy and powerful vibrations of vitality, clarity, and creativity. It stimulates the first three chakras, keeping one grounded and calm while pushing one forward into physical action. It calls upon primal strength which energizes the body, strengthening and fortifying the physical body
To cleanse the crystal with water, take it to a clear, unpolluted lake or stream to wash it for 1-3 minutes—or if none are available due to distance, submerge it in a clay bowl filled with pure water. Face the west while doing so. Let it soak for 24 hours. Water neutralizes the negative energy stored within the stone Crocidolite definition: a blue fibrous amphibole mineral consisting of sodium iron silicate : a variety of... | Meaning, pronunciation, translations and example new solutions, vol. 24(1) 1-26, 2014 features the four most pernicious myths in asbestos litigation: part i: safe chrysotile and idiopathic mesotheliom
Mindat.org is the world's leading website about minerals and where they come from Violet Goddess. 5,373 likes · 863 talking about this. Beauty Salo Crocidolite has the meaning and properties to enhance concentration. It is a gemstone to clear out unnecessary ideas cleanly. It is used when you want to thoroughly complete the work at hand. It is an amulet to make the fastest and greatest success. Crocidolite has the meaning and properties to enhance the owner's mental power Asbestos Crocidolite Crystals: Amazon.com: Industrial & Scientific. Skip to main content.us. Hello Select your address Industrial & Scientific Hello, Sign in. Account & Lists Account Returns & Orders. Cart All. Best Sellers Prime. Tiger's eye (also called Tiger eye) is a type of quartz replacement of the mineral crocidolite which is a form of asbestos, called blue asbestos. It is formed when the crocidolite has dissolved away over time, and replaced with silica (quartz). These days, you may have already noticed some people wearing tiger eye jewelry; tiger eye is.
The Properties Of Blue Tigers Eye Physical Properties . Tigers Eye is a form of Quartz and has the chemical composition SiO2. Its chemical name is silica or silica dioxide. It measures 7 on the Mohs scale for hardness and has a trigonal crystalline system While quartz typically forms prismatic (elongate, prism-like) crystals, in tiger's eye the original fibrous habit of crocidolite is preserved. The names of crystal habits are derived from: Predominant crystal faces (prism - prismatic, pyramid - pyramidal and pinacoid - platy). Crystal forms (cubic, octahedral, dodecahedral) Tigers Eye has many crystal healing properties. The main ones revolve around grounding and confidence. Drawing you to the earth with its golden brown colors, Tigers Eye is known as a powerful grounding stone. Stabilizing your emotional center, it is closely connected with self-confidence Anthophyllite is a stone of introspection, self-learning, and introspection. Its energies will help you release your self-imposed restraints. This stone is also associated with imagination, creativity, and inspiration. When you work with the energies of this stone, you will have an endless supply of unique and great ideas
Tiger Eye is created when quartz forms over existing bluish-grey crocidolite, and eventually entirely replaces it. Crocidolite is a type of asbestos mineral, which means its composition is of fine, dense fibres. These fibres form in a parallel yet wavy orientation, and this causes the intriguing chatoyant effect exhibited in tiger eye A classic example is tiger's eye quartz, crocidolite asbestos replaced by silica. While quartz typically forms prismatic (elongate, prism-like) crystals, in tiger's eye the original fibrous habit of crocidolite is preserved. The names of crystal habits are derived from: [citation needed Dumortierite brings this sense of order to all things, and releases fear, boosting your courage, creativity and expression. Emotionally, Dumortierite greatly reduces problems with a scattered mind and disorganization, and brings mental clarity. It also helps you to clearly see and accept reality, and react to it intelligently on your own behalf
The photos above show examples of different mineral habits. Habit, a property closely related to crystal shape, includes shape and size of crystal faces, how forms combine, how well developed different forms are, and the way multiple crystals grow together.Habit, thus, is the characteristic appearance a mineral can have. Some examples of different habits are shown in the photographs above RIEBECKITE - var. CROCIDOLITE, quartz. Outjo, Outjo District, Kunene Region, Namibia. weight: 62 g
Crystal Form • External Crocidolite Birefringence - color changes under crossed-polars due to retardation Biotite Plane polarized light Crossed-polars. Department Environmental, Earth, & Atmospheric Sciences Polarizing Light Microscopy (PLM) - a forensic workhors Tiger's Eye forms when Quartz forms over existing bluish-gray Crocidolite, and eventually entirely replaces it.Crocidolite is a type of asbestos mineral, which means its composition is of fine, dense fibers. These fibers form in a parallel yet wavy orientation, and this causes the intriguing chatoyant effect exhibited in Tiger's Eye. During the replacement process, the iron within the. The Crocidolite surrounding the asbestos is not changed during the process, but the reflective properties of the layers of Quartz cause the stone to become chatoyant. If there is iron present during the process the Crocidolite takes on a golden brown color (Tiger Eye), if not it retains its original dark blue color (Hawk's Eye) Tiger Eye is a must for anyone's healing kit. Golden Tiger Eye is a powerful Solar Plexus Chakra stone, helpful to manifest ideas into reality and giving courage in times of change. Use Golden Tiger Eye with the Solar Plexus Chakra to increase your personal power. Tiger Eye enhances psychic abilities and balances the lower Chakras
This makes chrysotile asbestos the only member of the serpentine asbestos family, while the other family of asbestos with needle-shaped fibres is known as amphibole asbestos (comprised of amosite, crocidolite, anthophyllite, tremolite and actinolite) 1. Introduction. No one in society is indifferent to the word `asbestos' which refers to a family of six fibrous minerals: the layer silicate chrysotile and the double-chain silicates or amphiboles actinolite asbestos, amosite (cummingtonite-grunerite asbestos), anthophyllite asbestos, crocidolite (riebeckite asbestos) and tremolite asbestos (Case et al., 2011; Ballirano et al., 2017) Ended (Tomorrow, 11:37) From Thailand. AMAZING 119.960CT RARE NR!! CROCIDOLITE QUARTZ CABOCHON GREENISH GRAY CAT'S EYE. C $323.65. Was: Previous Price. C $539.43. or Best Offer Koegas Mine, Prieska, Pixley ka Seme, Northern Cape Province, South Africa - Thick aggregate of parallelly grown curved fibrous crystals of blue riebeckite, variety crocidolite, from the Koegas mine. Acquired in 1982. Ex Jan Sibtsen #4478
Find the perfect crocidolite stock photo. Huge collection, amazing choice, 100+ million high quality, affordable RF and RM images. No need to register, buy now Quartz crystal replaces the fibers of crocidolite, though other scientists now argue that quartz and crocidolite simultaneously grow in parallel fibers to make the tigers eye rock. Either way, this results in a parallel intergrowth of quartz crystals and traces of iron oxide, which gives the tigers eye gemstone its chatoyancy, or the golden.
Finsch Mine, Lime Acres, ZF Mgcawu, Northern Cape Province, South Africa - Thick blue aggregate composed of myriads of very fine blue fibers. From a probably very thick vein, the overall sinusoidal appearance of the fibers gives a catting effect, a classic these specimens are famous for. From the superb B. Flurin collection (CH), this is a specimen dated back to 1971. B. Flurin was a. At Gemstagram you will find all things crystals information and even more crystal benefits that will definitely give your life new meaning and fun! POPULAR POSTS. Facts About Opalite: Meanings, Properties, and Benefits. March 2, 2021. Facts About Black Obsidian: Meanings, Properties, and Benefits
All bulk stones are sold by weight. Mostly 1 lb lots. The average sizes and counts will very . We are bulk seller and you should not depend on counts, but weights because that is what our prices reflect Asbestos is a commercial term applied to a group of naturally occurring silicate minerals that have a fibrous crystal structure. Among the six known asbestos minerals, only three have been used on a large industrial scale: chrysotile Mg 3 [Si 2 O 5](OH) 4, crocidolite Na 2 Fe 3 Fe 2 [(OH)Si 4 O 11] 2 and amosite (Fe,Mg) 7 [(OH)Si 4 O 11] 2.Asbestos has advantageous physical and chemical. 6-sided 3D faceted gemstone point is secured in an ornate sterling silver cap with loop. This hand-cut tigereye drop displays distinctive variations in color, surface details and overall appearance. Tigereye (also called tiger's eye stone) is silicified crocidolite in quartz. When it's cut into shapes, that iridescent undulating luster (also called chatoyancy) is as hypnotic as looking into. Cinnabar are the red crystals in the photo below. The proper mineral name for Cinnabar happens to be Mercury Sulfide.. Cinnabar has a Mohs hardness (that's a term we use to determine how hard it is) of 2 to 2.5.That means it's relatively soft, meaning it can easily be scratched & can flake off. So, mercury that can easily flake offhmmm, something to keep in mind
Tiger Eye Bracelet Meaning. A tiger eye bracelet is traditionally worn to protect against evil.Since ancient times, the stone is used to ward off ill-wishes and curses cast upon the wearer.. Aside from protection, it is also used to promote a clear mind so the wearer can better see the world.. Many also wear this piece to draw out the courage, strength, and self-confidence of the Tiger. Carvings concerning with Buddhism, such as Amitabha, Kwan-yin, prayer beads, avalanched as amulets to protect people from disease and evil and agents to carry their emotion, expectation and belief to BuddhaMade of good Silicified Crocidolite.Excellent quality Crystal Cautions. This list is an ongoing work in progress. It contains geological data that can help to protect you when using certain types of crystals/minerals. While most in the metaphysical/spiritual community only speak of the higher purpose properties, common sense must be taken into consideration when using these on a physical level
The mineral crocidolite, however, has strong fibers, shows good resistance to alkalizes and acids but poor resistance to heat. That makes this mineral great for fabric used in acid-resistant packaging. In the amphibole group, deposits of amosite and crocidolite compos Now, an Italian team has used different crystal varieties of asbestos to gain new insights into the chemical basis of the fibre and fungi interaction. Various strains of soil fungi can remove iron from crocidolite asbestos and so potentially render it harmless. The phenomenon could offer a relatively simple solution to the bioremediation of. Crocidolite, which has iron and sodium as its only metallic elements, is the most colorful, adorned in a range of colors including shades of lavender, blue and green. In general, asbestos-containing iron may display a green color ranging from a hint of green to solid green depending upon the amount of iron present Attributes: Olive green or pale yellow-green. Energy: A prosperity crystal which reverses bad-luck. Spiritual: Inspires confidence in the divine plan & assists one to have faith in any situation. Mental: It serves as a bridge between the body, mind & spirit.Enables one to express thoughts of love & gratitude. Encourages one to raise the bar of one's performance in life and work Riebeckite is a sodic amphibole (rich in Na). It forms a solid solution series with another sodic amphibole glaucophane. The chemical formula of the glaucophane-riebeckite pair: Na 2 Mg 3 Al 2 Si 8 O 22 (OH) 2 (glaucophane) — Na 2 Fe 32+ Fe 23+ Si 8 O 22 (OH) 2 (riebeckite) Both of them contain sodium, but magnesium and aluminum of. Keywords Asbestos Crocidolite Thermal decomposition Dehydroxylation DTA TG FT-IR Introduction Asbestos is a commercial term applied to a group of naturally occurring silicate minerals that have a ﬁbrous crystal struc-ture. Among the six known asbestos minerals, only three have been used on a large industrial scale: chrysotile Mg 3[Si 2O 5](OH