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A round, bright red gem displayed on a dark gray background.
Article
The Red Hot Gems of Summer

These red, pink and orange hued gems evoke passion and excitement – and are surefire accessories for sultry summer days.

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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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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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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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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 bicolour gems.

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The Chinese red feldspar controversy: chronology of research up until July 2009

Red copper-containing plagioclase feldspar from Oregon has been available for over a century. In the early 2000s, new localities for copper-bearing feldspar were reported from the Democratic Republic of the Congo and from Tibet or an unspecified locality in China.

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Sunstone Quality Factors

Learn about the factors that make sunstone so desirable.

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And Then Came the Fantasy Cut

Once upon a time, gem cutting was a strict craft bound by centuries of tradition. Then Bernd Munsteiner (b. 1943) invented the fantasy cut.

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Article
Sunstone Description

Not all feldspars that bear the name “sunstone” are from the same side of the feldspar family - both the orthoclase and the plagioclase species boast a sunstone feldspar variety. The name sunstone refers to the gem’s appearance rather than to its chemical makeup.

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Article
Positive Design With Negative Space

Sometimes what you don’t see is as important as what you do. “Negative space” is the explanation for this curious statement.

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