Antigorite
ID: 129
Antigorite
Chemical Formula
(Mg,Fe2+)3Si2O5(OH)4
Hardness (Mohs)
3.5 - 4
Crystal System
Monoclinic
Streak
Greenish white, white, or grayish.
Luster
Vitreous to greasy
Diaphaneity
Translucent to Subopaque
Color
Green, dark green, yellowish-green, blueish-gray, white, gray, brown, black.
Crystal Habit / Mode of Occurrence
Massive or platy, bladed, fibrous, scaly.
Fun Facts
Antigorite is a common mineral in serpentinite rocks and is often associated with other serpentine polymorphs.