{"product_id":"18-81-ct-natural-cats-eye-tourmaline-paraiba-type-gia-certified-greenish-blue-tourmaline-collector-cabochon-gemstone","title":"18.81 Ct Natural Cat's Eye Tourmaline (Paraíba-Type) | GIA Certified Greenish Blue Tourmaline | Collector Cabochon Gemstone","description":"\u003ch2 data-section-id=\"1bw7wp4\" data-start=\"147\" data-end=\"169\"\u003eProduct Description\u003c\/h2\u003e\n\u003cp\u003e15090\u003c\/p\u003e\n\u003cp data-start=\"171\" data-end=\"487\"\u003eAn extraordinary \u003cstrong data-start=\"188\" data-end=\"232\"\u003e18.81 carat Natural Cat's Eye Tourmaline\u003c\/strong\u003e, accompanied by a GIA Gemological Report documenting its remarkable \u003cstrong data-start=\"301\" data-end=\"326\"\u003echatoyancy phenomenon\u003c\/strong\u003e and attractive \u003cstrong data-start=\"342\" data-end=\"365\"\u003egreenish blue color\u003c\/strong\u003e. This impressive gemstone belongs to one of the most fascinating and collectible categories within the tourmaline family.\u003c\/p\u003e\n\u003cp data-start=\"489\" data-end=\"849\"\u003eThe gemstone displays a distinct and well-defined \u003cstrong data-start=\"539\" data-end=\"559\"\u003eCat's Eye effect\u003c\/strong\u003e, a rare optical phenomenon known as chatoyancy, where a bright band of light appears to glide across the surface as the stone is moved under illumination. This mesmerizing effect is highly prized by collectors and is found only in select gemstones possessing the proper internal structure.\u003c\/p\u003e\n\u003cp data-start=\"851\" data-end=\"1220\"\u003eOf particular interest, GIA notes that this \u003cstrong data-start=\"895\" data-end=\"986\"\u003ecopper and manganese-bearing tourmaline may be called \"Paraíba Tourmaline\" in the trade\u003c\/strong\u003e, a designation associated with some of the world's most sought-after and valuable tourmalines. The gemstone exhibits an attractive greenish blue hue combined with a strong cat's eye effect, creating a truly unique collector specimen.\u003c\/p\u003e\n\u003cp data-start=\"1222\" data-end=\"1534\"\u003eFashioned as a double cabochon to maximize the visibility of the chatoyancy, this gemstone possesses impressive size, rarity, and visual appeal. At \u003cstrong data-start=\"1370\" data-end=\"1386\"\u003e18.81 carats\u003c\/strong\u003e, it represents a significant collector gemstone suitable for advanced collections, investment portfolios, or exceptional bespoke jewelry creations.\u003c\/p\u003e\n\u003chr data-start=\"1536\" data-end=\"1539\"\u003e\n\u003ch2 data-section-id=\"y5ghnr\" data-start=\"1541\" data-end=\"1567\"\u003eGemstone Specifications\u003c\/h2\u003e\n\u003cp data-start=\"1569\" data-end=\"1611\"\u003e\u003cstrong data-start=\"1569\" data-end=\"1582\"\u003eGemstone:\u003c\/strong\u003e Natural Cat's Eye Tourmaline\u003c\/p\u003e\n\u003cp data-start=\"1613\" data-end=\"1636\"\u003e\u003cstrong data-start=\"1613\" data-end=\"1625\"\u003eSpecies:\u003c\/strong\u003e Tourmaline\u003c\/p\u003e\n\u003cp data-start=\"1638\" data-end=\"1671\"\u003e\u003cstrong data-start=\"1638\" data-end=\"1650\"\u003eVariety:\u003c\/strong\u003e Cat's Eye Tourmaline\u003c\/p\u003e\n\u003cp data-start=\"1673\" data-end=\"1697\"\u003e\u003cstrong data-start=\"1673\" data-end=\"1684\"\u003eWeight:\u003c\/strong\u003e 18.81 Carats\u003c\/p\u003e\n\u003cp data-start=\"1699\" data-end=\"1714\"\u003e\u003cstrong data-start=\"1699\" data-end=\"1709\"\u003eShape:\u003c\/strong\u003e Oval\u003c\/p\u003e\n\u003cp data-start=\"1716\" data-end=\"1757\"\u003e\u003cstrong data-start=\"1716\" data-end=\"1733\"\u003eMeasurements:\u003c\/strong\u003e 17.79 × 13.27 × 9.92 mm\u003c\/p\u003e\n\u003cp data-start=\"1759\" data-end=\"1783\"\u003e\u003cstrong data-start=\"1759\" data-end=\"1769\"\u003eColor:\u003c\/strong\u003e Greenish Blue\u003c\/p\u003e\n\u003cp data-start=\"1785\" data-end=\"1834\"\u003e\u003cstrong data-start=\"1785\" data-end=\"1802\"\u003eTransparency:\u003c\/strong\u003e Semi-Transparent to Translucent\u003c\/p\u003e\n\u003cp data-start=\"1836\" data-end=\"1890\"\u003e\u003cstrong data-start=\"1836\" data-end=\"1851\"\u003ePhenomenon:\u003c\/strong\u003e Distinct Chatoyancy (Cat's Eye Effect)\u003c\/p\u003e\n\u003cp data-start=\"1892\" data-end=\"1926\"\u003e\u003cstrong data-start=\"1892\" data-end=\"1910\"\u003eCutting Style:\u003c\/strong\u003e Double Cabochon\u003c\/p\u003e\n\u003cp data-start=\"1928\" data-end=\"1964\"\u003e\u003cstrong data-start=\"1928\" data-end=\"1950\"\u003eGeographic Origin:\u003c\/strong\u003e Not Requested\u003c\/p\u003e\n\u003cp data-start=\"1966\" data-end=\"2007\"\u003e\u003cstrong data-start=\"1966\" data-end=\"1984\"\u003eCertification:\u003c\/strong\u003e GIA Gemological Report\u003c\/p\u003e\n\u003cp data-start=\"2009\" data-end=\"2042\"\u003e\u003cstrong data-start=\"2009\" data-end=\"2031\"\u003eGIA Report Number:\u003c\/strong\u003e 2546610303\u003c\/p\u003e\n\u003cp data-start=\"2044\" data-end=\"2071\"\u003e\u003cstrong data-start=\"2044\" data-end=\"2053\"\u003eDate:\u003c\/strong\u003e February 11, 2026\u003c\/p\u003e\n\u003chr data-start=\"2073\" data-end=\"2076\"\u003e\n\u003ch2 data-section-id=\"rzoyts\" data-start=\"2078\" data-end=\"2101\"\u003eAdditional GIA Notes\u003c\/h2\u003e\n\u003cp data-start=\"2103\" data-end=\"2125\"\u003e\u003cstrong data-start=\"2103\" data-end=\"2125\"\u003eComments from GIA:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"2127\" data-end=\"2224\"\u003e\u003cem data-start=\"2127\" data-end=\"2224\"\u003e\"This copper and manganese bearing tourmaline may be called 'paraíba tourmaline' in the trade.\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp data-start=\"2226\" data-end=\"2378\"\u003eThis designation significantly enhances the gemstone's collector appeal due to the strong market recognition associated with copper-bearing tourmalines.\u003c\/p\u003e\n\u003chr data-start=\"2380\" data-end=\"2383\"\u003e\n\u003ch2 data-section-id=\"1ma69zm\" data-start=\"2385\" data-end=\"2416\"\u003eWhy This Gemstone Is Special\u003c\/h2\u003e\n\u003cp data-start=\"2418\" data-end=\"2448\"\u003e✔ Natural Cat's Eye Tourmaline\u003c\/p\u003e\n\u003cp data-start=\"2450\" data-end=\"2465\"\u003e✔ GIA Certified\u003c\/p\u003e\n\u003cp data-start=\"2467\" data-end=\"2495\"\u003e✔ Rare Chatoyancy Phenomenon\u003c\/p\u003e\n\u003cp data-start=\"2497\" data-end=\"2525\"\u003e✔ Copper \u0026amp; Manganese Bearing\u003c\/p\u003e\n\u003cp data-start=\"2527\" data-end=\"2562\"\u003e✔ Paraíba-Type Trade Classification\u003c\/p\u003e\n\u003cp data-start=\"2564\" data-end=\"2596\"\u003e✔ Exceptional 18.81 Carat Weight\u003c\/p\u003e\n\u003cp data-start=\"2598\" data-end=\"2630\"\u003e✔ Attractive Greenish Blue Color\u003c\/p\u003e\n\u003cp data-start=\"2632\" data-end=\"2658\"\u003e✔ Collector-Grade Gemstone\u003c\/p\u003e\n\u003cp data-start=\"2660\" data-end=\"2681\"\u003e✔ Rare Optical Effect\u003c\/p\u003e\n\u003cp data-start=\"2683\" data-end=\"2735\"\u003e✔ Highly Uncommon Combination of Size and Phenomenon\u003c\/p\u003e","brand":"Saleh Sallom","offers":[{"title":"Default Title","offer_id":46954829938876,"sku":null,"price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/8428\/1532\/files\/hf_20260525_090139_16e34e0b-ccdb-4e6f-8e60-c872f0869f78.png?v=1781345166","url":"https:\/\/www.salehsallom.com\/products\/18-81-ct-natural-cats-eye-tourmaline-paraiba-type-gia-certified-greenish-blue-tourmaline-collector-cabochon-gemstone","provider":"Saleh Sallom","version":"1.0","type":"link"}