IGI Certified Natural Tanzanite – 6.11 Carats Presented is an exceptional Natural Tanzanite weighing 6.11 carats, expertly fashioned into a classic cushion cut. Measuring 11.61 × 11.56 × 6.14 mm, this impressive gemstone displays a captivating violetish-blue to deep blue colour with excellent transparency and brilliance. Accompanied by an International Gemological Institute (IGI) certificate, this tanzanite has been professionally identified and authenticated, providing buyers with confidence in its natural origin and quality. Tanzanite is found exclusively in the foothills of Mount Kilimanjaro, Tanzania, making it one of the world's rarest gemstones. Its impressive size and elegant cushion cut make it an outstanding centre stone for bespoke rings, pendants, or an investment-quality gemstone collection. Gemstone Details Gemstone: Natural Tanzanite Species: Zoisite Variety: Tanzanite Weight: 6.11 Carats Shape/Cut: Cushion Mixed Cut Measurements: 11.61 × 11.56 × 6.14 mm Colour: Violetish Blue / Deep Blue Transparency: Transparent Certification: International Gemological Institute (IGI) Number of Stones: 1 Highlights Natural Tanzanite 6.11 Carats Elegant Cushion Cut IGI Certified Rich Violetish-Blue Colour Excellent Transparency & Brilliance Rare Collector's Gemstone Ideal for Luxury Bespoke Jewellery Exact Gemstone Shown in the Photographs Secure Worldwide Shipping