A true color change 1.65cts fancy unheated sapphire cushion cut.... Color-change sapphires are corundum’s chameleons—stones that change color under different lighting. Under daylight-equivalent (fluorescent) light, the typical color-change sapphire’s basic hue ranges from blue to violet. Under incandescent light, it ranges from violetish purple to reddish purple. When gem experts judge color-change sapphires, they describe the color change as weak, moderate, or strong. The strength of the stone’s color change is the most important quality factor affecting its value, followed in importance by bodycolor. The trace element vanadium causes color change in sapphire. Where corundum forms, there’s rarely enough vanadium present to create color change, so these sapphires are very rare. #colorchangesapphires #unheatedsapphires #colorchangestones #colorchangegems
Posted on: Sun, 25 Jan 2015 04:39:18 +0000
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