{"title":"Chrysotile","description":"\u003cp\u003e\u003cstrong\u003eChrysotile\u003c\/strong\u003e is the most common member of the serpentine group, a hydrous magnesium silicate with the formula Mg3Si2O5(OH)4 that crystallizes as fine, silky fibers rather than compact crystals. It forms when hot, mineral-rich fluids alter ultramafic rocks such as peridotite and dunite, producing veins of parallel, cross-fiber growth within massive serpentinite. This fibrous habit, combined with flexibility, heat resistance, and a pearly to silky luster ranging from white to golden-green, made \u003cstrong\u003echrysotile\u003c\/strong\u003e historically the most exploited variety of asbestos, and today gives fine vein specimens a unique place in serpentine-group and asbestos-mineralogy collections. It is closely associated with \u003cstrong\u003elizardite\u003c\/strong\u003e and \u003cstrong\u003eantigorite\u003c\/strong\u003e, the other two serpentine polymorphs, as well as with \u003cstrong\u003emagnetite\u003c\/strong\u003e, \u003cstrong\u003ebrucite\u003c\/strong\u003e, and fibrous amphiboles like \u003cstrong\u003etremolite\u003c\/strong\u003e and \u003cstrong\u003eactinolite\u003c\/strong\u003e, which frequently occur as accessory phases within chrysotile veins.\u003c\/p\u003e\u003cp\u003eThe type locality and one of the most historically important sources is \u003cstrong\u003eThetford Mines\u003c\/strong\u003e in Quebec, Canada, together with the nearby \u003cstrong\u003eBlack Lake\u003c\/strong\u003e and \u003cstrong\u003eAsbestos\u003c\/strong\u003e districts, where enormous serpentinite bodies made this region the world's leading chrysotile producer for over a century. Other classic serpentine-hosted deposits include the \u003cstrong\u003eBazhenovo district\u003c\/strong\u003e in the Ural Mountains of Russia, extensive occurrences across \u003cstrong\u003eZimbabwe\u003c\/strong\u003e and the \u003cstrong\u003eBarberton area\u003c\/strong\u003e of South Africa, and carbonate-hosted veins in \u003cstrong\u003eVermont\u003c\/strong\u003e, USA, at \u003cstrong\u003eBelvidere Mountain\u003c\/strong\u003e. In Italy, the \u003cstrong\u003eBalangero mine\u003c\/strong\u003e near Turin in Piedmont stands out as a particularly notable and locally significant source: \u003cstrong\u003ethe largest and most active chrysotile mine in Europe operating from 1916 to 1990\u003c\/strong\u003e, it also yielded the closely related fibrous mineral \u003cstrong\u003ebalangeroite\u003c\/strong\u003e, first described from this deposit and named after it.\u003c\/p\u003e\u003cp\u003eCollector specimens of chrysotile are prized for their silky, chatoyant fiber bundles, often displayed as cross-fiber veins running through dark green to black serpentinite matrix, sometimes showing a golden sheen reminiscent of tiger's eye quartz, to which chrysotile is mineralogically related through pseudomorphic replacement in some occurrences. Museum-quality pieces from Quebec, the Urals, and Balangero document a mineral of major industrial history alongside genuine scientific and aesthetic interest, making well-labeled, safely mounted specimens sought after by serpentine-group specialists, asbestos-history collectors, and systematic mineral collections seeking to represent this classic silicate species.\u003c\/p\u003e","products":[{"product_id":"a0-asbestos","title":"CHRYSOTILE ASBESTOS – Huge 22cm Fibrous Tuft on Matrix, Valmalenco, Italy","description":"\u003cp\u003eA striking natural tuft of fibrous chrysotile asbestos, displaying long, silky fibers of a soft white-grey tone radiating outward on matrix. This large, aesthetically outstanding specimen comes from the historic Mt. Motta mining complex in the Valmalenco Valley, a classic Alpine locality that is now rarely represented on the international collector market.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMineral Data:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 220 x 80 x 69 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 554 g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProvenance:\u003c\/strong\u003e Mt. Motta, Lanzada, Sondrio Province, Lombardy, Italy\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ITALMINERAL","offers":[{"title":"Default Title","offer_id":45732225941613,"sku":null,"price":119.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0693\/8027\/6333\/files\/AGC_20250501_152507820.jpg?v=1787995341"}],"url":"https:\/\/www.italmineral.com\/collections\/chrysotile.oembed","provider":"ITALMINERAL","version":"1.0","type":"link"}