Synthetics are also represented on the chart, with images of sapphires grown by flux, flame fusion, hydrothermal, and other methods. This dissolved titanium pairs with iron to increase the amount of blue color in the stone. A case in point is the “internal diffusion” seen in a heat-treated sapphire, induced as the titanium from rutile silk inclusions was dissolved into the crystal lattice of the host sapphire at high temperatures. Other images highlight features that may be diagnostic for a particular treatment. Examples of inclusions that may be highly indicative of a particular origin are provided, such as a tourmaline crystal in a sapphire from Kashmir, India. The selection of photomicrographs chosen for this chart represents the wide variety of inclusion scenes one might encounter in sapphire. Micro-features seen in sapphires that have been treated by heating, or by filling of open fractures, to improve their color and clarity. Origin: Thailand Size: 12.8 x 10.4 x 6.9 mm tall Treatment: none Weight: 10.Comprehensive CAD/CAM For Jewelry Certificate I missed measured with my old calipers as I do not use my digital ones around water and thought it would finish a 12 x 10 but instead it is 12.8 x 10.4 but should fit a prong style mount but will need slightly tall prongs to make it more secure in the setting. It will make a stunning ring for a man or Lady. Well in any case it is a nice one and has had no treatments. The legs look more defined and it also helps make the star show up more in the direct sunlight and also helped to center the star in the middle of the stone. I tried something different with this big one I gave it a high dome and more of a flat crown to see if it made the star more dramatic. Thailand Natural Black Star Sapphire 10.90 carat Product Thumbnail Price: $ 333.00 Gem Id: 10947 Clarity: opaque Color: black-dark brown body color with gold star Cut: oval cabochon high dome Notes: Well I had a bunch of this material I bought in 2000 as i cut a lot of cabs back then and stars and cats eyes were my favorites.
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