Photo: John Sobolewski (JSS) · CC BY 3.0

Phyllosilicate mineral member of the chlorite group

Properties

Chemical formula

(Fe²⁺,Mg,Al,Fe³⁺)₆(Si,Al)₄O₁₀(OH,O)₈

Group

Silicates

Crystal system

Monoclinic

Hardness (Mohs)

3

Color

Green

Luster

—

Streak

—

Density

—

Cleavage

—

Fracture

—

Tenacity

—

Crystal habit

—

Transparency

—

Space group

—

Fluorescence

—

Magnetism

—

Radioactivity

—

Refractive index

—

Optical character

—

Birefringence

—

Pleochroism

—

Strunz classification

9.EC.55

Dana classification

71.4.1.7

IMA status

Grandfathered mineral (G)

IMA symbol

Chm

Locality

🇨🇭 Haut de Cry

Type locality

—

Discovery year

—

Source: Wikidata