Fall 2015 - Volume 51, Issue 3
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134.43 ct hibonite specimen.
Large Faceted Hibonite

A hibonite of unusual size examined in the Carlsbad lab is host to a spinel inclusion.

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Colorless hole intersecting with cone in pink diamond.
Unusual Graining Structure in Pink Diamond

A Very Light pink diamond showing a uniform plane of color intersecting with a cone of strain that fit perfectly into a colorless hole is studied at the Carlsbad lab.

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A 5.85 faceted orange eosphorite.
Orange Faceted Eosphorite

The first faceted eosphorite, a member of the childrenite-eosphorite series, is seen in the Carlsbad lab.

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Blue-violet assembled cultured blister pearl.
Assembled Cultured Blister Pearl with an Unusual Component

An assembled mabe pearl contains a fluted object, the function of which is unknown.

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Jadeite with natural and dyed green areas.
Dyed and Natural Green Jadeite

Spectroscopy and microscopic observation reveal that areas of a natural green jadeite carving have been dyed.

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HPHT-processed yellow rough diamond.
Yellow HPHT-Processed Rough Diamond

HPHT annealing of a nearly eye-clean yellow natural rough diamond is revealed through spectroscopic analysis.

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Green-blue CVD synthetic diamonds.
Irradiated Green-Blue CVD Synthetic Diamonds

Advancing CVD growth technologies yield intensely colored, high-quality synthetic diamonds, such as the two green-blue synthetic materials seen in the New York lab.

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Freeform topaz under daylight-equivalent light.
Polished Freeform Topaz Imitating Diamond Rough

Material submitted as a rough diamond is revealed through gemological testing and analysis to be a near-colorless topaz.

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Kornerupine beads with metallic coating.
Coated Kornerupine Beads

Beads with an unusual metallic luster are found to be kornerupine with a coating possibly made with copper.

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Three abalone pearls alongside South Sea bead-cultured pearl.
Three Unique Large Natural Pearls from Haliotis (Abalone) Species

Abalone pearls submitted to the New York lab provide insight into the range of colors and shapes this type of mollusk can produce.

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