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Recent production of turquoise from Polk County, Arkansas
Turquoise from Western Arkansas

A report on turquoise from the only known U.S. deposit outside of the Southwest.

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Large sunstone rough from the Ponderosa mine in Oregon
Ponderosa Sunstone Update

John Woodmark provides an update on the Ponderosa sunstone mine in Oregon.

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Nine “Concho” pearls with a Tampico pearlymussel shell.
Freshwater Natural Pearls from the Concho River, Texas

A rare look at freshwater pearls with a United States origin.

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Map of main aquamarine deposits of northern Pakistan.
Aquamarine from Pakistan

A gemological investigation of the aquamarine that has emerged from northern Pakistan in recent years.

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Indonesian opal cabochons, 6.94 and 3.79 ct.
Opal from West Java, Indonesia

Description of Indonesian opal reportedly from West Java.

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Suite of untreated Ethiopian emeralds
A New Discovery of Emeralds from Ethiopia

A report on a new Ethiopian source of high-quality emerald.

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Rough blue sapphire found near Ambatondrazaka.
Sapphire Rush Near Ambatondrazaka, Madagascar

A newly found deposit of sapphire in Madagascar is explored.

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Pink sapphire mining pit at Kibuko, Tanzania
Update on Colored Gemstone Mining in Tanzania

Reports on an expedition to many known and new Tanzanian gem localities.

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Aquamarine from San Luis Potosí State in northern Mexico
Aquamarine from a New Primary Deposit in Mexico

Examination of aquamarine samples from a new primary deposit in San Luis Potosí, northern Mexico.

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Trapiche-like rhodochrosite “flower” from Capillitas mine, Argentina
Trapiche Rhodochrosite

Reports on exceptionally rare trapiche-patterned rhodochrosite from the famed Capillitas mine in Argentina.

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