This stone is a very rare Bullseye pattern of chatoyant chrysocolla alternating with vibrant green malachite. It is essentially a cross section of an ancient stalactite that was mined out of the Tyrone mine more than 30 years ago.
The free form stone is approximately 40mm x 19mm and its currently set in a sturdy sterling silver wire wrap setting that has an overall length of approximately 2.5".
Native Americans and later the Spanish had originally mined Turquoise in the Burro Mountains where the Tyrone Mine is located today near Silver City, New Mexico. Current methods of extraction using a weak acid solution dissolves any copper ores including Azurite, Chrysocolla, and Malachite. Therefore any Tyrone gemstones available today are nearly always from older collections and are highly valued both for their stunning beauty and extreme rarity.
A stunning piece from my personal collection. Enjoy!