Turquoise — specimen 0602, photo © NMNHS

Turquoise — specimen 0602

Origin

North America

USA

Data

Weight: 0.68 ct; size: 7.03 | 5.02 | 2.70 mm; shape: oval; colour: medium green-blue or blue-green; very slightly greyish; clarity: opaque; cut: good; treatment: none.

Notes

Clean specimen; good cabochon style cut.

Other specimens

More information from ‘Classification’

Turquoise

A secondary mineral occurring in hydrothermal porphyry copper deposits (Anthony et al., 2001—2005). One of the oldest gemstones; used by Ancient Egypt rulers.