Montana Sapphire Cabochon - 4mm Round Lot | Bicolor Teal-Blue | American Gemstone | SA306
Montana Sapphire Cabochon - 4mm Round Lot | Bicolor Teal-Blue | American Gemstone | SA306
Round 4mm cabochon-cut Montana sapphires, offered as a lot of three. Montana sapphire is among the most coveted domestically sourced gems in the American market, produced from alluvial and primary deposits in the Missouri River drainage and the Rock Creek and Dry Cottonwood Creek districts of western Montana. Montana material is immediately distinguishable from the dominant commercial sapphires of Sri Lanka, Madagascar, and Thailand by its color palette — the steely, metallic, and parti-colored tones unique to this origin are a direct product of the deposit's distinct trace element chemistry and are not reliably replicated by material from any other source. For designers and buyers prioritizing American provenance, Montana sapphire is the benchmark domestic colored stone.
Listing is for the whole lot of three.
Origin: Montana, USA
Species: Corundum
Variety: Sapphire
Cut: Cabochon, round
Size: 4mm diameter (4mm x 4mm x 2.2mm)
Sold: As lot of three
Treatment: Heat Treated
Hardness: 9 Mohs
Refractive Index: 1.762–1.770
Carat Weight: ~.4 carats per stone
Materials: Montana Sapphire.
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