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Magnesite — specimen 0164, photo © NMNHS
Magnesite — specimen 0164, photo © NMNHS

Magnesitespecimen 0164


South America
Magnesite — specimen 0164, locality map

Weight: 4.86 ct; size: 11.55 | 9.62 | 6.01 mm; shape: octagon; colour: colourless; clarity: eye clean; cut: good; treatment: none.

Very clean specimen; good step cut style. Source: John Bradshaw, Coast to Coast Rare Stones International.

More information from ‘Classification’

A primary mineral in igneous or sedimentary rocks; formed by metamorphism or alteration of serpentine and peridotite; rare in carbonatites (Anthony et al., 2001—2005). Faceted specimens are very rare. The largest faceted stone is a 134.5 carat from Brazil (Arem, 1987: 127).