I purchased these Sonoran Sunrise cabs from a fellow jeweler recently. (Thank you, Karen!) Sonoran Sunrise is the apt name given to the the red mineral, cuprite ( copper bearing) in chrysocolla. It's found in Mexico, and do these colors ever "pop" together! And this batch is probably some of the most intense I've seen! The cut and polish on these stones is excellent. Sized from large pendant/ brooch pieces to statement rings and a pair of earrings. They will be a pleasure to work with!