Turquoise Preforms (backed and to be backed) Turquoise is a copper-based mineral (hydrated copper aluminum phosphate). Turquoise polishes well with tin oxide or cerium oxide. Item #: Stabilized Turquoise Large Preforms 1Q - Parcel of 9 stones - $30.51 Locality: Unknown
Stabilized Turquoise Preforms Parcels - $.35/gram Locality: Unknown
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