Clinochlore (Chlorite) / Ryodeiseki (Green Mud Stone)
Clinochlore is the primary representative of the "Chlorite" group, a general term derived from the Greek word "chloros" (green). Formed by the decomposition of pyroxene and amphibole, it often occurs as an aggregate of microcrystals (clay mineral). It can be found as inclusions in Moss Agate or Quartz, giving them a deep green color.
Characterized by scaly to platy aggregates
Basic Information
| English Name | Clinochlore (Chlorite) |
|---|---|
| Japanese Name | Ryodeiseki (Green Mud Stone) |
| Chemical Formula | (Mg,Fe2+,Al)3[(OH)4|AlSi3O10] |
| Crystal System | Monoclinic |
| Hardness | 2–2.5 |
| Specific Gravity | approx. 2.72 |
Varieties, Types, and Related Minerals
- Mg-rich: Penninite / Fe-rich: Daphnite, Thuringite / Al-rich: Amesite.
- Kämmererite: A variety of clinochlore containing Cr, exhibiting colors from purple to green. Often found associated with Uvarovite (Andradite Garnet).
- Trade Name: False mica.
- Treatment: Lighter colors may be dyed green.
- Similar Minerals: Mica, Chloritoid (harder).