Thank you for viewing this item. This is a Tanzanite K18 pendant head, 0.40ct. As shown in the photos, the blue-violet color reminiscent of the Tanzanian dawn is pure tanzanite. You can easily see why Tiffany & Co. named it. This is a fine piece made in a workshop in Yamanashi. The entire base metal is finished in K18 yellow gold, giving it a luxurious feel and significant asset value. Note: A GGS sorting report can be provided free of charge, but it will take about a week. Please understand that there may be discrepancies with our in-house carat scale. Please understand that this is a natural gemstone, so inclusions are to be expected. P.CODE-TZ01