August 11th, 2008 at 1:31am |
Nature has conferred on zircon several quite outstanding optical properties which furnish brilliant-cut specimens with a particularly striking appearance. High adamantine luster and very vivid fire elevate zircon into the immediate proximity of diamond. Its specific gravity is unequalled by any other transparent gemstone. Its high refractive index of 1.95 and powerful color-dispersive ability of [...]
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August 11th, 2008 at 1:26am |
Over and above the gemstones are still numerous minerals which make beautiful gemstomes in cut form as well as completely fulfilling the requirements of beauty, rarity, and durability. Their popularity and their market success are mostly determined by their great rarity; because of the latter they are all the more coveted by collectors. Contrary to [...]
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August 11th, 2008 at 1:22am |
Agate—diversely beautiful, multicolored, and variously formed as it is, its endless abundance of abstract designs can only be hinted at by the descriptions “spotted, cloudy, marbled, banded, or dappled.” To the ancient Greeks and Romans it was already known in the form of colored pebbles collected from the Achates River in Sicily.
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