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Half colorless and half brown rutilated quartz sphere.

A New Type of Rutilated Quartz Composite Product

Shu-Hong Lin, Yu-Ho Li, and Huei-Fen Chen, January 22, 2021

Demand for rutilated quartz spheres in Taiwan gives rise to a new type of composite material.

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An emerald from Swat Valley shows an interesting growth pattern with two colorless cores.

Trapiche-Type Emeralds from Pakistan

Karl Schmetzer, January 22, 2021

An emerald from the Swat Valley manifests its growth in three distinct steps, identifying it as “trapiche-type.”

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<i>Pinctada Margaritifera</i> bead cultured pearls, cut in half (left) and intact (right).

A Near-Field-Communication (NFC) Technology Device Embedded in Bead Cultured Pearls

Artitaya Homkrajae, January 22, 2021

A Tahitian pearl becomes wearable technology with the insertion of a micro device.

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The 2020 GSA annual meeting was held virtually.

GSA Annual Meeting: Gem Research Session

James E. Shigley, January 22, 2021

The 2020 Geological Society of America virtual conference covered a variety of interesting gemological topics.

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Red oil used to clarity enhance gemstones like ruby and spinel.

Oiled Spinel

Richard W. Hughes, January 22, 2021

Testing of a Mogok spinel demonstrates that oil can have a significant impact on clarity.

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Unusual violet color of a Maxixe beryl.

Unusual Violet Maxixe Beryl

Amy Cooper, Ziyin Sun, Dylan Hand, and Nathan Renfro, January 22, 2021

A handsome fantasy-cut gem of an unusual violet hue is confirmed as maxixe beryl.

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Large 75 ct black star sapphire for testing.

Black Star Sapphire with Dual Treatments

Richard W. Hughes, E. Billie Hughes, and Wimon Manorotkul, January 22, 2021

Examination of a large black star sapphire reveals filling with both glass and dopping varnish.

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Vietnamese pearl farm employee at Hạ Long Bay

Vietnam: Shell Nuclei, Pearl Hatcheries, and Pearl Farming

Nicholas Sturman, Kwanreun Lawanwong, Nuttapol Kitdee, and Devchand Chodhry, January 22, 2021

Reports on a visit to a shell nucleus manufacturer and two pearl farms in northern Vietnam, which is emerging as a notable producer.

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Spodumene with a rare light blue color.

Blue Spodumene

Forozan Zandi, January 22, 2021

Raman analysis helps to confirm the identification of a rare and lovely large blue spodumene.

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Change of color observed in an alexandrite.

Dramatic Color Zoning in Alexandrite

Vararut Weeramongkhonlert, January 22, 2021

A gem cutter’s thoughtful design enhances the natural color zoning in an 8.55 ct alexandrite.

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