Winter 2015 - Volume 51, Issue 4
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Two Paraíba tourmalines showing asterism
Stars Are Out in Paraíba Tourmaline

Rare material from Brazil features four-ray stars under point-source light.

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“Dragon’s eye” in Mexican fire agate.
“Dragon’s Eye” Fire Agate

A Mexican fire agate cabochon’s coloration and structure combines to create an unusual visual effect.

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Three parasite crystals in Colombian rock quartz
Parisite in Colombian Quartz

Rare material found as inclusions in quartz is thought to have formed simultaneously with the host.

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Red heart-shaped pyrope inclusion in diamond.
Red Heart Inclusion in Diamond

Under magnification, a round brilliant diamond features a pyrope garnet inclusion in an aesthetically pleasing shape.

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Trapiche structure in muscovite
Trapiche Muscovite

A look at specimens knows as “cherry blossom stones” from Kyoto Prefecture in Japan.

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Violetish blue spinel inclusion in sapphire.
Violetish Blue Spinel in Yellow Sapphire

A singly refractive inclusion within a yellow sapphire proves to be spinel.

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