The hessonite garnet contains calcium, the pyrope contains manganese and the almandite contains iron.Ī diamond is a diamond is a diamond – and is probably one of the most commonly used gems in jewelry manufacturing through the ages. Today there are other green varieties as well as other reddish varieties such as the ‘hessonite’ shown here (upper left). (The most popular myth for the origin of the name is ‘diamond like’, something quite far from actuality.) This green is due to calcium and iron. However, in the nineteenth century (during the reign of Alexander III of Russia 1881-1894) the green variety was discovered and was called ‘demantoid’ (demon-like) because they thought that the devil had changed the color. Iron and aluminum will give the sapphire yellow, and purple sapphires have chromium, titanium and aluminumĪ garnet – in any other color – is still a garnet – when it is red, it is understood. The ruby contains chromium and aluminum while blue sapphires contain titanium and iron. Shown here are many of the varieties of corundum. Corundum also can have a natural ‘star’ in it depending on the angles of the silk-like inclusions. Sapphires need not, however, be blue – any color of the rainbow will do except red. Often some of the most interesting colors are used in antique jewelry.Ī corundum by any other name is still a corundum when red, it is called RUBY. However, these “traditional” colors are usually not the only colors that exist for these gems.
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