Winter 2016 - Volume 52, Issue 4
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Curved features in sapphire.
Curved Tubes in Blue Sapphire

Curved linear inclusions, unusual in corundum, are found in sapphire acquired in Vietnam.

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This Russian titanite is green due to vanadium.
Quarterly Crystal: Growth Features on Titanite

Dramatic growth features are found on the surface of a titanite specimen from Russia.

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Chalcedony plate with quartz windows.
Quartz Windows in Chalcedony

Transparent windows in chalcedony show Brazil-law twinning that vary as the piece is moved.

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Sphalerite inclusion in Namibian demantoid.
Sphalerite Inclusions in Namibian Demantoid

A rare inclusion scene is found in a garnet crystal from Namibia.

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Synthetic quartz crystal with inclusion suite of almandine and pyrope.
Synthetic Quartz: A Designer Inclusion Specimen

A collectable inclusion specimen is created by introducing garnets to synthetic quartz during the growth process.

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Apatite crystal cluster in feldspar.
Apatite Cluster in Orthoclase Feldspar

An apatite crystal cluster, notable for its morphology and size, is found in a feldspar specimen.

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Iridescent colors of the ferropericlase inclusion.
Ferropericlase Inclusion in Diamond

An iridescent inclusion may reveal a diamond’s subsurface origin.

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