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)
tetragonalcommonPhyllosilicates
Apophyllite
(K,Na)Ca₄Si₈O₂₀(F,OH)·8H₂O
This image displays a cluster of well-formed, colorless to white apophyllite crystals, exhibiting a blocky tetragonal habit and a vitreous luster.
Apophyllite Physical Properties
Mohs Hardness
4.5Crystal System
tetragonalLuster
vitreousStreak Color
whiteCleavage
perfect on {001}Fracture
unevenSpecific Gravity
2.35Colors
colorless, whiteTransparency
transparentType Locality
Pashan, Pune District (Poonah District), Maharashtra, IndiaMineral Group
PhyllosilicatesUses
collector, ornamentalAssociated Minerals
zeolites, calcite, prehniteRarity
commonGeological Context
Apophyllite commonly forms as a secondary mineral in the vesicles and cavities of basaltic and other volcanic rocks, often in association with zeolites and other hydrothermal minerals.
