{"title":"Tourmaline","description":"\u003cp\u003e\u003cstrong\u003eTourmaline\u003c\/strong\u003e is a complex borosilicate mineral group prized by collectors and gemologists alike for its extraordinary range of colors, often within a single crystal. Chemically it belongs to the cyclosilicates, with boron combined with aluminum, iron, magnesium, sodium, or lithium; the main species collectors seek include \u003cstrong\u003eelbaite\u003c\/strong\u003e, \u003cstrong\u003eschorl\u003c\/strong\u003e, \u003cstrong\u003edravite\u003c\/strong\u003e, \u003cstrong\u003euvite\u003c\/strong\u003e, and \u003cstrong\u003eliddicoatite\u003c\/strong\u003e. Color zoning, from watermelon pink-green crystals to deep indicolite blue, comes from substitutions of manganese, iron, and chromium within the structure.\u003c\/p\u003e\u003cp\u003eThe species was first described from the \u003cstrong\u003eRosina pegmatite\u003c\/strong\u003e near San Piero in Campo on the island of \u003cstrong\u003eElba\u003c\/strong\u003e, Italy, still famous for its historic \"Moor's Head\" bicolor crystals. Other classic elbaite localities include \u003cstrong\u003eMount Mica\u003c\/strong\u003e and the \u003cstrong\u003eDunton Quarry\u003c\/strong\u003e in Maine, the \u003cstrong\u003eHimalaya Mine\u003c\/strong\u003e in California, \u003cstrong\u003eStak Nala\u003c\/strong\u003e in Pakistan, \u003cstrong\u003eMogok\u003c\/strong\u003e in Myanmar, the \u003cstrong\u003eMalkhan pegmatite\u003c\/strong\u003e in Siberia, and Madagascar's \u003cstrong\u003eSahatany\u003c\/strong\u003e field. The most exceptional specimens, however, are the copper-bearing \u003cstrong\u003eParaíba tourmalines\u003c\/strong\u003e from Brazil, with comparable neon-blue material later found in \u003cstrong\u003eNigeria\u003c\/strong\u003e and \u003cstrong\u003eMozambique\u003c\/strong\u003e, alongside vivid chrome-rich green tourmaline from \u003cstrong\u003eTanzania\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eCollectors value tourmaline for its unmatched color diversity, sharp striated prismatic habit, and the rarity of gem-clarity crystals from historic pegmatite localities, making fine specimens both scientifically important and highly decorative.\u003c\/p\u003e","products":[],"url":"https:\/\/www.italmineral.com\/collections\/tourmaline.oembed","provider":"ITALMINERAL","version":"1.0","type":"link"}