- Stone Type: Natural Zoisite (Tanzanite) - Color: Bluish Violet, Transparent - Carat Weight: 1.01 Carats - Shape and Cut: Square Cushion Mixed Cut - Measurements: 6.21 x 6.17 x 3.29 mm - Laboratory: IGI (International Gemological Institute) - Report Number: 772694306 - Report Date: February 17, 2026 - Report Type: Colored Stone Report - Characteristics: Natural Characteristics - Comments: Tanzanites are commonly enhanced by heat; indicative evidence is typically lacking. - Optical & Physical Properties: - Refractive Index: 1.691 – 1.700 - Birefringence: 0.009 - Optic Character: Biaxial - Specific Gravity: 3.35 - Note: Optical and physical properties are approximate values. Import Customs Tax The Buyer Is Fully Responsible For Any Import Customs Duties And Taxes In Their Country. We Do Not Have Any Control Over These Duties, Taxes &, Etc. Import duties, taxes, and VAT are not included in the item price. Return Policy After Receiving The Item - "Contact Seller Within - 7 Days" Shipment We ship via Expedited Shipping UPS - DHL Express - FedEx from Bangkok, Thailand