Apophyllite
ID: 104
Apophyllite
Chemical Formula
KCa₄Si₈O₂₀(F,OH)·8H₂O
Hardness (Mohs)
4.5–5
Crystal System
Tetragonal
Streak
White
Luster
Vitreous to pearly
Diaphaneity
Transparent to Translucent
Color
Colorless, white, green, pink
Crystal Habit / Mode of Occurrence
Tabular, prismatic
Density
2.33–2.37
Fun Facts
Apophyllite is known for its high water content and perfect cleavage, making it popular among mineral collectors. It belongs to the Apophyllite Group and is brittle.