Oregon Sunstone Faceted Oval | Sunstone | 1ct | Per Stone | USA | OSF240
Oregon Sunstone Faceted Oval | Sunstone | 1ct | Per Stone | USA | OSF240
Oregon Sunstone is a plagioclase feldspar - specifically labradorite - found in only a handful of locations worldwide, with the Ponderosa Mine in Lake County, Oregon producing some of the most mineralogically significant material available. What sets Oregon Sunstone apart from other feldspar gem varieties is its copper-bearing nature: thin platelets of native copper suspended within the crystal lattice create aventurescence, known in the trade as schiller. This optical effect ranges from a soft, diffuse glow to bold, metallic flashes depending on the density and orientation of the copper inclusions. Red is the rarest color expression in Oregon Sunstone - the result of higher copper concentrations - and fine red material in faceted form represents a small fraction of total production.
These stones carry no treatment of any kind; the color and phenomenon are entirely natural and stable. For a designer sourcing regionally significant, fully traceable material, Ponderosa-origin stones offer both mineralogical credibility and a domestic provenance story that resonates with today's market.
These are faceted oval stones weighing approximately 1 carat each, cut to 8x5mm or slightly larger. The four available stones are: S1 at 0.90ct measuring 8x5.1x3.4mm, S2 at 0.96ct measuring 8.2x5.3x3.8mm, S3 at 1.00ct measuring 8.1x5.1x3.5mm, and S4 at 1.00ct measuring 8.3x5.5x4.0mm. The color is an intense red with the kind of saturation that reads well in both warm and cool metal settings. Schiller is present in all stones, though its intensity varies per stone - an inherent characteristic of the material rather than a quality deficiency, and worth considering when matching stones to a specific design intent. The consistent oval format and near-uniform size make these practical for repeat settings, pairs, or small suites. Depth varies between stones, with S4 carrying the most material at 4.0mm, which may influence bezel depth or prong placement decisions. Stones are sold individually.
DETAILS
Origin: Ponderosa Mine, Oregon, USA
Species: Feldspar
Variety: Oregon Sunstone
Also Known As: Sunstone, Heliolite, aventurine feldspar
Cut: Faceted, Oval
Weight: 1 ct
S1: .90ct — 8x5.1x3.4 mm
S2: .96ct — 8.2x5.3x3.8 mm
S3: 1ct — 8.1x5.1x3.5 mm
S4: 1ct — 8.3x5.5x4 mm
Sold: Per Stone
Treatment: None
Hardness: 6 – 6.5 Mohs
Refractive Index: 1.518 – 1.572
Couldn't load pickup availability
Low stock: 1 left
View full details
More Information
Shipping Policy
Free shipping is available for US-based customers via USPS First Class Mail for orders valued at $35 or more. International purchases incur a $30 fee and will be shipped via UPS with tracking. Please note that you should be aware of your local VAT laws, as you may be subject to additional customs or tax fees based on your country of residence. All purchases are shipped within 1-3 business days. Delivery times vary, ranging from 2-5 days for the USA and 7-14 days outside the United States, depending on the location. You will receive a tracking number as soon as your package is shipped.
Return Policy
Privacy Policy
As described in our Privacy Policy, we collect personal information from your interactions with us and our website, including through cookies and similar technologies. We may also share this personal information with third parties, including advertising partners. We do this in order to show you ads on other websites that are more relevant to your interests and for other reasons outlined in our privacy policy.
Sharing of personal information for targeted advertising based on your interaction on different websites may be considered "sales", "sharing", or "targeted advertising" under certain U.S. state privacy laws. Depending on where you live, you may have the right to opt out of these activities. If you would like to exercise this opt-out right, please follow the instructions below.
If you visit our website with the Global Privacy Control opt-out preference signal enabled, depending on where you are, we will treat this as a request to opt-out of activity that may be considered a “sale” or “sharing” of personal information or other uses that may be considered targeted advertising for the device and browser you used to visit our website.