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The Sapphire as talisman Sapphire, one of the earliest gems known to man, is found in riverbeds and torrents, the force of the water washing the stones from their matrix ; and to this day are still found under these conditions. In its finest quality the Sapphire is of a deep blue colour, and the [...] Zircon appears to have been first discovered by Klaproth in 1789, in the form of an earth, and six years later he found that the stone hyacinth contained a similar substance, both having the formula, ZrSiO4, and both having as their colouring agent ferric oxide. There are several methods of obtaining the metallic element, [...] |
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