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Orthoclase — specimen 0478, photo © NMNHS
Orthoclase — specimen 0478, photo © NMNHS

Orthoclase — specimen 0478

Origin

South America
Brazil
Orthoclase — specimen 0478, locality map
Data

Weight: 1.67 ct; size: 12.48 | 4.41 | 3.71 mm; shape: octagon; colour: light yellow; very slightly brownish; clarity: eye clean; cut: good; treatment: none.
Notes

Very clean specimen; good step style cut.

Other specimens
Orthoclase — specimen 0259Orthoclase — specimen 0352

More information from ‘Classification’

Orthoclase

A common feldspar of granites, granite pegmatites, and syenites; in cavities in basalts; in metamorphic rocks (Anthony et al., 2001—2005).


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The specimens illustrated in this site do not exist in the collections of the National Museum of Natural History, Sofia.