sapphire

…more information about what you’re examining. The UV-Vis-NIR spectrometer gives a quick confirmation of cobalt-treated sapphire…

Although diamond is our most popular gemstone, this hasn’t always been the case. Only in the last century did diamonds become readily available.…

…may pass you by. Price them too low and you’ll lose profits. [Reading time: 3 min] Kite step-cut sapphire, 4.22 cts, 17.62 x 8.82 mm, Australia.…

…Don’t confuse color banding with pleochroism in doubly refractive gems, such as sapphires. For best color, particularly cornflower…

…including a rude form of faceting, had its origins in that country. It goes without saying that the more famous transparent gems, ruby, sapphire…

…or spot of color deeper in hue than the surrounding material. Sapphire, amethyst, and citrine frequently show this. Simply orient the desired…

…4.27 cts, Tanzania. Aquamarine, Large Stone Barion Cushion Cut, 22.15 cts. Sapphire, Barion Keystone Cut, 1.15 cts, Africa (likely Madagascar).…