Rare identification of two kinds of copper-bearing inclusions in agate from the Yanyuan region in China.
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Popular “candy agate” beads are identified as epoxy-filled chalcedony at the Taiwan Union Lab of Gem Research.
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The Carlsbad laboratory encounters its first example of a transparent purple faceted single crystal anhydrite.
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Brownish purple material initially thought to be spinel is revealed to be scapolite.
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Agate appears as an interesting inclusion in a pair of faceted quartzes.
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An orangy brown opal from Ethiopia displays a small patch of wavy "varve" banding, unusual for this type of gem.
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A Mexican fire agate cabochon’s coloration and structure combines to create an unusual visual effect.
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A vibrant orange and yellow agate displays interesting concretions in its core.
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Two varieties of colorful plume agates, characterized by inclusions resembling clouds of smoke, are sourced from Iran.
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