sapphire

…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…

…sizes on the chart. The density or specific gravity (SG) of the material will also affect the weight. For example, a 6.5 mm round diamond, sapphire…

…with amethysts. Photo by Ryan Hyde. Licensed under CC By-SA 2.0. Identifying Characteristics Amethysts may appear similar to other popular…

Summary The beautiful blue stone lapis lazuli has been highly prized for thousands of years. Scholars believe many early historical references…

…crystal inclusions. Sapphire Warm water, detergent, and soft brush. Mechanical cleaning. (See Comments). Sapphire, like ruby, is gem-quality…

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