CERTIFIED 21.32ct NATURAL AAA BLOCK D BLUE TANZANITE BGL Certificate Included for The Winner of Gem Start Price USD 15,000.00 Current Price USD 15,000.00 Time Left - Bid Count 0 Buy It Now Price - Reserve Price - Start Time Thursday, November 13, 2008 End Time Sunday, November 23, 2008 Location Center Gems Market, THAILAND See more about 'CERTIFIED 21.32ct NATURAL AAA BLOCK D BLUE TANZANITE' Description ThaiGemStore Ebay Power Seller         Shipping & PAYMENT International Shipping Return Policy • Any item may be returned for refund within 7 days of receipt. Item(s) must be returned in original condition. • Return is subject to a 10% withdrawal of value of order as a restock fee. Shipping costs are non-refundable.   Video Clip of Actual item Please wait while loading ............Flash Player, Click Here! Add to Favorite Stores | Sign up for Store newsletter    Item Number: TZ031-001-001.  Quantity: 1 piece.  Weight: 21.32 Carat.  Gem Type: Natural Tanzanite.  Shape: Pear / Mixed.  Size in millimeter: 17.94 Length. 14.34 Width. 12.09 Deep.  Color: AAA Blue.  Clarity: VVS.  Luster: Very Good.  Origin: Tanzania, Africa.  Treatment: Heated.  Hardness: 6.5.  Refractive Index: 1.691 to 1.700.  Specific Gravity: 3.10 to 3.45. Picture of Actual Item for Sale This Certification is Included For The Winner of This Gemstone Please click Photo for Larger size to read    TANZANITE: Tanzanite has never been synthesized, but a number of imitations exist. The most common is blue-violet glass. A synthetic fosterite has also been used as an imitation and is known as Tanzanique in the trade. It has a lower RI than Tanzanite and does not have the same pleochroism so is easily distinguished from the real thing. However, laymen can easily be fooled so always buy from a reputable dealer, preferably a member of the ICA (International Colored Gemstone Association) which has a strict code of ethics. Clean tanzanite in warm, soapy water. Avoid ultrasonics and steamers. Tanzanite is stable to light but reacts to hydrochloric and hydrofluoric acid. The Biggest problem with tanzanite is that it’s very susceptible to cracking when bumped or knocked. That combined with its tendency to abrade makes it inappropriate for wear in everyday rings. It’s an impressive stone, however, for necklaces, earring and brooches More information about Gemstone Please Click Here Feedback Award   Color grading for web | Clarity Scale | Shape | Treatment and Enchantment | Hardness | Refractive index | Birthstone Copyright © 2007 Thaigemstore Created by eBay Blackthorne ver. 3.2.31.0 Place a Bid!