Agate — specimen 0124, photo © NMNHS
USA, Montana, Yellowstone River
Weight: 4.37 ct; size: 13.15 | 13.13 | 3.25 mm; shape: round; colour: dark reddish orange; 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.