A stunning clean blue-green specimen of natural turquoise with very little matrix. This is vintage material and from what I and others can tell is totally natural, with no consolidants, hardeners or enhancement. About 95% of real turquoise is actually treated to make it hard enough to work and polish, and to not absorb skin oils. There are a variety of accepted treatments but I think this is pure rough turquoise. If you look closely this specimen is made up of lots of tiny spheres of turquoise. Unfortunately I don't know where this was mined but based on the collection that it came from I'm pretty sure it is from the USA.
13/16 inch (2.0 cm) wide, 5/16 inch (0.8 cm) deep and just under 1 inch (2.5 cm) tall.