Nacozari (sometimes called Naco) Turquoise. It was a mine in Sonora, Mexico. The mine is located south of the Bisbee, Arizona mine in the same mountain range. Many have infact posted this material as Bisbee because it matches so closely the color, hardness and matrix. Nacozari is fast becoming highly collectible as it has become impossible to get. It is now a owned by a Canadian gold mining company and is currently closed and the property monitored closely. I purchased this material from a miner who was able to get it before the mine closed many years ago. The Son and I do all the cutting work we never farm it out. We are Native American gem cutters, we are registered members of the federally recognized Native American tribe Wichita Indians out of Oklahoma. To be clear “100% NATURAL” it is all turquoise no backing was used If it just says “NATURAL” it is natural and backed with JB Weld. The photos in this listing are taken in natural sunlight. Size is Approximate give or take .5 mm Note: In the event of any typos in this listing, the item in the photos is the one or ones you will receive if you purchase this item. PLEASE NOTE: In the event of any typos in this listing, the item in the photos is the one or ones you will receive if you purchase this item. Some countries don't allow gemstones to be shipped to their citizens. Please check with Customs before making your purchases. If you live in one of the countries that don't allow gemstones to be imported and you buy from us, we will issue a refund and not ship the item. We offer a “NO HASSLE” seven-day refund with return shipping paid by the buyer. Our return policy starts when you receive the stone or it hits your PO Box, Buyer Pays return Shipping.