{"title":"Tourmaline","description":"\u003ch3\u003e\u003cstrong\u003eTourmaline — Species Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003e(Complex Borosilicate · Variable Composition)\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTourmaline is one of the most chemically diverse gem species, resulting in an extraordinary range of colors. Popular colors include the electric blue of Paraiba, stately deep blue of indicolite, to the rich reddish purple of rubellite to a variety of soft pastels. It is rare to find clear tourmaline! \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTourmaline shows varying levels of pleochlorism, meaning viewing the crystal from one direction will show one color when viewed down the length of the crystal and will show when viewed from the side. Some tourmaline have what is called a \"closed C\" axis.  These crystals are black or near black when viewed down the length of the crystal.  This necessitates some specific cuts to prevent an overly dark stone. That said, tourmaline does come in solid black which can make for a striking piece!\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eOrigins\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eTourmaline forms in granitic pegmatites and metamorphic rocks. Notable sources include:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul role=\"list\"\u003e\n\u003cli\u003e\u003cspan\u003eBrazil\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAfghanistan\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePakistan\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMozambique\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNigeria\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUnited States (California, Maine)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eEach locality produces distinct color profiles.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eDurability \u0026amp; Wearability\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul role=\"list\"\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eHardness:\u003c\/strong\u003e 7–7.5 on the Mohs scale\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eGood toughness\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eStrong pleochroism\u003c\/strong\u003e for lively color shifts\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSuitable for rings, pendants, earrings, and statement cuts\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eTourmaline’s color diversity makes it one of the most expressive gem species.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSynthetics \u0026amp; Treatments\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul role=\"list\"\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eSynthetic tourmaline is not commercially produced\u003c\/strong\u003e for the jewelry market.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eCommon treatments include:\u003c\/span\u003e\n\u003cul role=\"list\"\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eHeat\u003c\/strong\u003e to improve color\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eIrradiation\u003c\/strong\u003e for pinks (stable and accepted)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAll stones from Mossy Duck Gems are clearly labeled if treated.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","products":[],"url":"https:\/\/mossyduckgems.com\/collections\/tourmaline.oembed","provider":"Mossy Duck Gems","version":"1.0","type":"link"}