Image: <bdi><a href="https://www.wikidata.org/wiki/Q56247090" class="extiw" title="d:Q56247090"><span title="mineral collector and dealer">Robert M. Lavinsky</span></a></bdi> (CC BY-SA 3.0)
tricliniccommonSilicates
Andesine
(Na,Ca)Al(Si,Al)Si2O8
This specimen displays a reddish-orange, somewhat translucent crystal with distinct cleavage planes, characteristic of the plagioclase feldspar group.
Andesine Physical Properties
Mohs Hardness
6Crystal System
triclinicLuster
vitreousStreak Color
whiteCleavage
perfect on {001}, good on {010}Fracture
unevenSpecific Gravity
2.67Colors
white, gray, reddish, green, yellow, orangeTransparency
transparentType Locality
Silberberg Mine, Bodenmais, Lower Bavaria, Bavaria, GermanyMineral Group
SilicatesUses
jewelry, collector, rock-formingAssociated Minerals
quartz, cordierite, garnet, other feldspars, micas, amphibolesRarity
commonGeological Context
Andesine is a common rock-forming mineral found in intermediate igneous rocks (like andesite and diorite) and metamorphic rocks such as gneiss, often associated with polymetamorphic iron sulphide deposits.
