Black Opal
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| Black Opal isn't very black, but its background hue is much darker compared to other opals (see below). |
Fire Opal
Opal
Oriental Amethyst
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| Also called Violet Sapphire, this gem is much harder than the occidental Amethyst. A near-colorless version is difficult to distinguish from diamonds. |
Oriental Topaz
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| Also called Yellow Sapphire. When rubbed or heated the Yellow Topaz can generate an electrical charge. |
Star Ruby
Star Sapphire
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