Image: <bdi><a href="https://www.wikidata.org/wiki/Q108103612" class="extiw" title="d:Q108103612"><span title="Wikipedian and OpenStreetMap mapper from Cologne, Open Data activist">Raimond Spekking</span></a></bdi> (CC BY-SA 4.0)
tetragonalcommonPhyllosilicates
Apophyllite
KCa₄Si₈O₂₀(F,OH)·8H₂O
This specimen features a cluster of colorless to white, transparent apophyllite crystals, often displaying a pyramidal or tabular habit with a distinct vitreous luster.
Apophyllite Physical Properties
Mohs Hardness
4.5Crystal System
tetragonalLuster
vitreousStreak Color
whiteCleavage
Perfect on {001}Fracture
unevenSpecific Gravity
2.35Colors
colorless, white, green, yellow, pink, violetTransparency
transparentType Locality
IndiaMineral Group
PhyllosilicatesUses
collector, spiritualAssociated Minerals
stilbite, heulandite, scolecite, calcite, quartzRarity
commonGeological Context
Apophyllite commonly forms as a secondary mineral in the vesicles and cavities of basaltic volcanic rocks, such as the Deccan Traps in India, and can also be found in some granitic pegmatites or hydrothermal veins.
