{"product_id":"chrome-tourmaline-round-loose-gemstone-2-5mm-3mm-tanzania","title":"Chrome Tourmaline Round Loose Gemstone | 2.5mm 3mm | Tanzania","description":"\u003cp\u003eCalibrated round chrome tourmalines from Landanai, Arusha Region, Tanzania — one of the definitive sources for this rare tourmaline variety. Chrome tourmaline is not simply a green tourmaline; it is a chromatically distinct variety whose color is driven specifically by trace chromium (Cr³⁺) and sometimes vanadium, the same chromophores responsible for the finest emeralds and tsavorites. The result is a saturated, forest to vivid green with a depth and warmth that iron-colored green tourmalines cannot replicate. Under incandescent light, chrome tourmaline's color intensifies rather than grays out — a hallmark of chromium-driven color in any gem species.\u003c\/p\u003e\n\u003cp\u003eChrome vs. standard green tourmaline — why it matters:\u003cbr\u003e\nThe distinction is not marketing. Chromium-colored tourmalines are genuinely rarer than iron-green material, form in different geological environments, and produce a color that is measurably different under spectroscopic analysis. \u003c\/p\u003e\n\u003cp\u003eTourmaline is not routinely treated for color. These stones are natural, untreated material. Minor clarity characteristics consistent with natural tourmaline crystals may be present.\u003c\/p\u003e\n\u003cp\u003eOrigin: Landanai, Arusha Region, Tanzania\u003cbr\u003e\nSpecies: Tourmaline\u003cbr\u003e\nVariety: Chrome Tourmaline\u003cbr\u003e\nCut: Round (faceted), calibrated\u003cbr\u003e\nSizes Available: 2.5mm, 3mm\u003cbr\u003e\nColor: Medium to vivid green (chromium\/vanadium)\u003cbr\u003e\nTreatment: None\u003cbr\u003e\nHardness: 7–7.5 Mohs\u003cbr\u003e\nRefractive Index: 1.624–1.644\u003c\/p\u003e\n\u003cp\u003eMaterials: Chrome Tourmaline.\u003c\/p\u003e","brand":"Gem Enthusiast","offers":[{"title":"2.5mm \/ 1 Stone","offer_id":47538823200955,"sku":"TO615 - L1","price":12.0,"currency_code":"USD","in_stock":true},{"title":"2.5mm \/ 4 Stones","offer_id":47538823233723,"sku":"TO615 - L2","price":45.0,"currency_code":"USD","in_stock":true},{"title":"3mm \/ 1 Stone","offer_id":47538823266491,"sku":"TO615 - L3","price":27.0,"currency_code":"USD","in_stock":true},{"title":"3mm \/ 4 Stones","offer_id":47538823299259,"sku":"TO615 - L4","price":98.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0639\/8214\/1627\/files\/chrome-tourmaline-round-loose-gemstone-25mm-3mm-tanzania-8646829.jpg?v=1774719307","url":"https:\/\/gementhusiast.shop\/products\/chrome-tourmaline-round-loose-gemstone-2-5mm-3mm-tanzania","provider":"Gem Enthusiast","version":"1.0","type":"link"}