Product Details

1.3ct Peach Oval Sunstone Oregon sunstone is a unique variety of labradorite feldspar prized for its distinctive copper inclusions that produce aventurescence or “schiller.” Unlike most sunstones found elsewhere, Oregon material is often naturally transparent and facetable, displaying vibrant colors ranging from champagne to red and green. Mineralogical Information • Mineral species: Labradorite feldspar (plagioclase series) • Chemical formula: (Ca,Na)(Al,Si)₄O₈ • Crystal system: Triclinic • Hardness: 6–6.5 (Mohs) • Refractive index: ~1.56–1.57 • Birefringence: ~0.008–0.010 • Transparency: Transparent to translucent Color • Champagne • Orange • Red • Green • Occasionally bicolor or tricolor stones • Color and sparkle produced by microscopic copper platelets within the crystal Major Source • Oregon, USA, primarily in the Ponderosa and Rabbit Basin mining districts of southeastern Oregon Appearance and Optical Properties • Distinct aventurescence or schiller effect from copper inclusions • Transparent stones may show bright brilliance when faceted • Some stones display color zoning or multicolor effects • Bright vitreous luster typical of feldspar Rarity • Transparent gem-quality material is relatively uncommon among feldspars • Stones showing both strong color and copper schiller are especially desirable Collector Notes • Oregon sunstone is the official state gemstone of Oregon • Collectors prize stones showing red or green colors combined with copper sparkle, a characteristic rarely seen in sunstones from other regions