Image: <bdi><a href="https://www.wikidata.org/wiki/Q126871368" class="extiw" title="d:Q126871368"><span title="photographer from the United States">Darla Sondrol</span></a></bdi> (CC0)
triclinicuncommonSilicates
Moonstone
Na(90-70%)Ca(10-30%)(Al,Si)AlSi2O8
A translucent, whitish-gray mineral specimen, likely exhibiting a soft, shimmering adularescence characteristic of moonstone.
Moonstone Physical Properties
Mohs Hardness
6.5Crystal System
triclinicLuster
vitreousStreak Color
whiteCleavage
Perfect in two directions, nearly at 90 degrees ({001} perfect, {010} good)Fracture
unevenSpecific Gravity
2.64Colors
white, gray, blue, peach, pinkTransparency
translucentType Locality
NorwayMineral Group
SilicatesUses
jewelry, collectorAssociated Minerals
Rarity
uncommonGeological Context
Moonstone, a variety of feldspar (often orthoclase or oligoclase), forms in igneous rocks such as pegmatites and granites, and occasionally in metamorphic rocks.
