4.5mm Oregon Sunstones | Round Exceptional Cut | Medium, Light, or with Schiller | Per Stone
4.5mm Oregon Sunstones | Round Exceptional Cut | Medium, Light, or with Schiller | Per Stone
Oregon Sunstone is one of the only gemstones with an exclusively American origin, mined from the volcanic basalt flows of Harney and Lake Counties in Oregon. A variety of andesine-labradorite feldspar, these stones form naturally in a range of colors driven by trace copper content — from near-colorless and pale yellow to warm peach and salmon tones. Their domestic provenance and limited supply make them a standout choice for designers seeking a genuinely rare, traceable gemstone with a compelling origin story.
These 4.5mm faceted rounds are available in three distinct expressions: medium color (warm peachy-orange tones, no schiller), light color (soft, delicate hues, no schiller), and schiller (aventurescence created by copper platelets that catch and reflect light from within the stone). Each option offers a different design opportunity — from subtle sophistication to bold metallic flash — and the calibrated 4.5mm round cut ensures easy setting compatibility across standard findings and bezels.
**This listing is for ONE stone. You select the color and I will pick the best stone that I have in stock. Please message me if you have specific requests.
DETAILS
Origin: Oregon, USA
Species: Feldspar
Variety: Oregon Sunstone (Andesine-Labradorite)
Cut: Faceted Round, exceptional quality cut
Size: 4.5mm
Weight: Approximately 0.40 ct per stone
Sold: Individually (multiple color options available)
Treatment: None
Hardness: 6 – 6.5 (Mohs)
Refractive Index: 1.559 – 1.568
Materials: Oregon Sunstone.
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