Gemmology
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Prehnite — specimen 0109, photo © NMNHS
Prehnite — specimen 0109, photo © NMNHS

Prehnitespecimen 0109

Origin

Southern Africa
South Africa
Prehnite — specimen 0109, locality map
Data

Weight: 2.55 ct; size: 9.26 | 7.88 | 4.73 mm; shape: oval; colour: very light yellowish green; clarity: translucent; cut: fair; treatment: none.
Notes

Clean specimen; cabochon style cut.

Other specimens
Prehnite — specimen 0108Prehnite — specimen 0309Prehnite — specimen 0090Prehnite — specimen 0160Prehnite — specimen 0540

More information from ‘Classification’


A secondary or hydrothermal mineral in veins and cavities in mafic volcanic rocks; less commonly in granite, gneiss or syenite (Anthony et al., 2001—2005).