Oligoclase

Image

Photograph of Oligoclase (var. sunstone, NMNH G3273) from the National Gem Collection, showing golden sheen. Specimen from Tvedestrand, Aust-Agder, Norway

© Photo by Chip Clark, via Smithsonian National Museum of Natural History

Properties

Formula (Na,Ca)(Si,Al)4O8
Classification Plagioclase
Luminescence emitter Mn
Search other databases webmineral.com, mindat.org, rruf.info, fluomin.org, mineralienatlas.de, Handbook of Mineralogy, American Mineralogist Crystal Structure Database
Tags Variety, Aluminosilicate

Composition

Element Wt%
Na 6.93
Ca 3.02
Al 12.2
Si 29.63
O 48.22
Total: 100

References

Reference Lines Spectra Images
Telfer & Walker 1978 7 0 0
Torpy et al. 2020 0 1 0