Petersite, dark blue color with silvery-silky iridescences. Namibian deposit.
Frame: Author's, handmade, made of 925 * silver with blackening, in the lower part of the ring shank there is a nameplate and a sample of the State Assay Chamber.
Size - 18.5
The size of the stone (small) - 11x11x2. 5 mm, weight-9.34 g.