Agate — specimen 0611, photo © NMNHS
USA, Montana, Yellowstone River
Weight: 23.20 ct; size: 29.96 | 21.45 | 4.63 mm; shape: oval; colour: medium dark orange; strong; clarity: translucent; cut: very good; treatment: none.
Clean specimen; cabochon style cut..
More information from ‘Classification’
A variety of chalcedony with layered structure.