Exceptionally Large and Well-Saturated Orange Sapphire

A notable 31.06 ct well-saturated orange sapphire was recently submitted to the Carlsbad laboratory.

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Flux-Induced Fingerprints in Flame-Fusion Synthetic Sapphire

The Carlsbad laboratory received a lab-grown sapphire featuring a flux fingerprint similar to those found in natural sapphire.

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Novelty Cut Diamond Faceted as Iconic Apple Logo

A novelty cut Fancy yellow diamond submitted to the Carlsbad laboratory bears a striking resemblance to the iconic Apple Inc. logo.

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Pink Euclase

The Tokyo lab recently observed its first example of euclase with an orangy pink color, possibly caused by manganese.

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Epoxy-Filled Chalcedony as an Imitation for “Candy Agate”

Popular “candy agate” beads are identified as epoxy-filled chalcedony at the Taiwan Union Lab of Gem Research.

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“Floating Flower” Inclusions in Aventurine Quartz Bangle

Lab analysis proves that a bangle with “floating flower” inclusions believed to be jadeite jade or albite is actually highly translucent aventurine quartz.

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Historic Sales of Pink and Blue Diamonds from the Argyle Mine

Rio Tinto sells its final collections of pink and blue Argyle diamonds at record-breaking prices.

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Update on Mining Activity at Yogo Gulch, Montana

Renewed mining interest in Montana promises a return of the famous Yogo sapphire to the gem trade in the coming years.

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Unusual Composite Apatite-CO2 Inclusions in Sapphires from Ohn Bin Yee Htwet, Myanmar

The discovery of apatite and CO2 in a single inclusion in sapphire is reported for the first time by the Carlsbad laboratory.

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Natural Black Coral with Polyp Structure

Examination of a large black oval cabochon reveals an intense orangy brown and black polyp structure, indicating natural black coral.

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Quarterly Crystal: Rutile on Hematite

An unusual hematite crystal from Pakistan hosts a geometric outer skin of sagenitic rutile.

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Windmill Zoning in Tourmaline

Pink faceted tourmaline reveals unique colorless windmill-shaped zoning.

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Winter 2021 G&G Publication Information

This document provides the publication information for Gems & Gemology

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