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Prehnite — specimen 0540, photo © NMNHS
Prehnite — specimen 0540, photo © NMNHS

Prehnite — specimen 0540

Origin

West Africa
Mali
Prehnite — specimen 0540, locality map
Data

Weight: 4.59 ct; size: 12.24 | 9.70 | 5.70 mm; shape: oval; colour: light slightly yellowish green; strong; clarity: eye clean; cut: fair; treatment: none.
Notes

Very clean specimen; mixed style cut with large window.

Other specimens
Prehnite — specimen 0108Prehnite — specimen 0109Prehnite — specimen 0309Prehnite — specimen 0090Prehnite — specimen 0160

More information from ‘Classification’

Prehnite

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).


Gemmology — gemstones
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