Gemmology
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Prehnite — specimen 0309, photo © NMNHS
Prehnite — specimen 0309, photo © NMNHS

Prehnitespecimen 0309

Origin

Southern Africa
South Africa
Prehnite — specimen 0309, locality map
Data

Weight: 1.88 ct; size: 10.69 | 5.67 | 4.17 mm; shape: pear; colour: very light yellowish green; clarity: translucent; cut: fair; treatment: none.
Notes

Clean specimen; cabochon style cut.

Other specimens
Prehnite — specimen 0108Prehnite — specimen 0109Prehnite — 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).