Trimouns Talc Mine, Luzenac, Ariège, Occitanie, France

Mg₃Si₄O₁₀(OH)₂

Crystal System: triclinic or monoclinic
Colour: colorless, white, pale green, bright emerald-green to dark green, brown or gray
Habitus: commonly as fibrous, fine-grained massive or foliated aggregates. Rarely, as pseudotrigonal platy crystals
Lustre: sub-vitrous, resinous, waxy, greasy, pearly
Hardness: 1
Fracture: fibrous, micaceous
Cleavage: perfect on {001}
Density: 2.78 g/cm³
Origin and geological occurrence: a replacement product of Mg-bearing silicates in H₂O-rich environments at medium T. Also in low-T contact metamorphic impure dolostones.

www.mindat.org

Samples:

9E.5 Talc Fine-grained massive aggregate. Anger, Weiz, Austria #phylosilicates