I am going to say this is Royston turquoise without the turquoise ribbon running through it. It looks just like it & not like one might think, picture Jasper or another thought... Picasso Marble but I am really not sure. Very pretty stone cut into a Zuni village with onxy & red coral. Both ends are done in turquoise, red coral, onyx & mother of pearl. It will fit an 6 to 7" wrist. The opening is 1 3/16" inside measues 5 1/4". The cuff width is 1". It is a heavy 76 grams in weight. Signed GMC... Gilbert M. Calavaza. Very, very nice workmanship! Retails for $900.00 many places!! Quality piece!