Agate — specimen 0250, photo © NMNHS
no precise locality [Africa]
Weight: 1.43 ct; size: 7.36 | 7.34 | 5.24 mm; shape: octagon; colour: medium very slightly bluish green; slightly greyish; clarity: translucent; cut: excellent; treatment: none.
Clean specimen; design ‘Eight’ by Glenn & Martha Vargas, excellent cut by Tan Pen.
More information from ‘Classification’
A variety of chalcedony with layered structure.