Thunder Mountain Turquoise Mine located in Nevada it is a small mine and produces a very limited supply of turquoise each year. I have known the miner for years and he has allowed me to purchase a small amount of his rough. 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.