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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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Three Occurrences of Oregon Sunstone

Chronicles a visit to the high desert of eastern Oregon to examine commercial sources of this natural copper-bearing feldspar.

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Article
A Sunstone Odyssey, Part 1: The Ponderosa

The first of a three-part series exploring Oregon’s state gem reports on a July 2013 visit to the Ponderosa mine, a prolific sunstone source surrounded by majestic ponderosas.

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Article
A Sunstone Odyssey, Part 2: The Dust Devil

The "Sunstone Odyssey" series continues with a visit to the Dust Devil mine, a source of rough for many award-winning faceted gems and carvings.

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Article
A Sunstone Odyssey, Part 3: Sunstone Butte

The final part of the "Sunstone Odyssey" series explores the Sunstone Butte mine, a new location for large spectacular green and bicolor gems.

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Article
GIA Gem Project
Various Gems
(Danburite – Humite)

Among the collection assembled by Dr. Edward Gübelin are a number of uncommon gemstones from many worldwide localities.

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Sunstone Labradorite from the Ponderosa Mine, Oregon

The Ponderosa mine is now producing commercial quantities of the gem-quality labradorite feldspar known as sunstone.

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