This large sized rough from Nacozari has been enhanced using the Zachary Process, which is a less invasive treatment than stabilization. Absolutely no coloring has been added to this turquoise. Nacozari turquoise has a fine blue color which is now hard to find. Turquoise is no longer being produced at the Nacozari Mine and we consider ourselves very lucky to have been able to get this fine blue material from an old collection.
Turquoise is a copper-based mineral (hydrated copper aluminum phosphate). Turquoise polishes well with diamond, tin oxide or green rouge.
Sample of Large Size #1 Quality Enhanced Turquoise from Nacozari, Sonora, Mexico