Agate — specimen 0325, photo © NMNHS
USA, Montana, Yellowstone River
Weight: 4.02 ct; size: 14.41 | 10.17 | 3.24 mm; shape: oval; colour: medium dark orange; strong; clarity: translucent; cut: very good; treatment: none.
Clean specimen; very good cabochon style cut.
More information from ‘Classification’
A variety of chalcedony with layered structure.