{"title":"Topaz","description":"\u003cp\u003e\u003cstrong\u003eTopaz\u003c\/strong\u003e is an aluminum fluorosilicate mineral, Al2SiO4(F,OH)2, crystallizing in the orthorhombic system with a distinctive prismatic habit and perfect basal cleavage. Prized for its glassy vitreous luster and hardness of 8 on the Mohs scale, it forms in granitic pegmatites, greisen veins, and high-temperature rhyolite cavities, typically alongside \u003cstrong\u003etourmaline\u003c\/strong\u003e, \u003cstrong\u003eberyl\u003c\/strong\u003e, \u003cstrong\u003equartz\u003c\/strong\u003e, and \u003cstrong\u003efluorite\u003c\/strong\u003e. Natural color ranges widely from colorless and pale blue to golden yellow, sherry-brown, and the rare, highly sought pink and red tones caused by trace chromium.\u003c\/p\u003e\u003cp\u003eThe type locality tradition centers on Brazil's \u003cstrong\u003eMinas Gerais\u003c\/strong\u003e, especially the historic mines around \u003cstrong\u003eOuro Preto\u003c\/strong\u003e, source of the famed golden-orange \u003cstrong\u003eImperial Topaz\u003c\/strong\u003e — Brazil's national gemstone — as well as fine pink crystals from \u003cstrong\u003eBrumado\u003c\/strong\u003e in Bahia and giant crystals from \u003cstrong\u003eMimoso do Sul\u003c\/strong\u003e in Espírito Santo. Russia's \u003cstrong\u003eUral Mountains\u003c\/strong\u003e, particularly the classic locality of \u003cstrong\u003eMurzinka\u003c\/strong\u003e near Ekaterinburg, produced the legendary blue and light-green Topaz that once rivaled Brazilian material before these historic mines were exhausted. Siberia's \u003cstrong\u003eNerchinsk\u003c\/strong\u003e district in Transbaikalia yielded multicolored yellow and blue crystals, while \u003cstrong\u003eVolodarsk-Volynskii\u003c\/strong\u003e in Ukraine's Zhytomyr region is famous for transparent, often etched gem crystals. Pakistan's \u003cstrong\u003eGilgit\u003c\/strong\u003e and \u003cstrong\u003eSkardu\u003c\/strong\u003e districts, including the \u003cstrong\u003eShigar Valley\u003c\/strong\u003e, \u003cstrong\u003eShengus\u003c\/strong\u003e, and \u003cstrong\u003eDassu\u003c\/strong\u003e, are renowned for large, gemmy, pale-blue and pink thick crystals extracted from alpine-type fissures. Additional important sources include the gem gravels of \u003cstrong\u003eMogok\u003c\/strong\u003e in Myanmar, the \u003cstrong\u003eGaoligong Mountains\u003c\/strong\u003e of Yunnan, China, Nigeria's pegmatite fields, and classic American localities such as the \u003cstrong\u003eThomas Range\u003c\/strong\u003e in Utah and San Diego County, California.\u003c\/p\u003e\u003cp\u003eCollectors value Topaz for its combination of size, clarity, and color rarity: naturally deep blue or magenta stones from the Urals, matrix specimens (uncommon since basal cleavage causes crystals to separate easily), and untreated pink or red crystals command premium prices, since most commercial blue and pink Topaz on the market has been irradiated or heat-treated from paler starting material. Fine, well-terminated crystals from Pakistan, Brazil, and historic Russian finds remain benchmark specimens for any serious mineral collection, prized for sharp crystal faces, exceptional transparency, and the vivid palette this species is famous for.\u003c\/p\u003e","products":[{"product_id":"lz-topazio-messico-2","title":"TOPAZ – Amber Gem Crystal, Tepetate, San Luis Potosí, Mexico","description":"\u003cp\u003eA gem-quality Topaz crystal in a warm amber to sherry tone from Tepetate, a classic Mexican locality in San Luis Potosí famed for producing topaz remarkably similar to the finest sherry-colored material from Utah. Large-scale mining at this historic deposit has largely ceased, adding to the appeal of a well-formed crystal like this one.\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 22 x 10 x 6 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 3 g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProvenance:\u003c\/strong\u003e Tepetate, Villa de Arriaga Municipality, San Luis Potosí, Mexico\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ITALMINERAL","offers":[{"title":"Default Title","offer_id":45609765797997,"sku":null,"price":59.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0693\/8027\/6333\/files\/IMG20260527215628.jpg?v=1786528416"}],"url":"https:\/\/www.italmineral.com\/collections\/topaz.oembed","provider":"ITALMINERAL","version":"1.0","type":"link"}