Clinochlore Value, Price, and Jewelry Information


Grossular Clinochlore
Grossular (Var.: Hessonite), Clinochlore. Locality: Bellecombe, Châtillon, Aosta Valley, Italy (Locality at mindat.org). Size: 7.4 x 3.8 x 2.6 cm. Beautifully gemmy and lustrous, cherry-red hessonite (grossular) garnets with complimentary, tabular, green clinochlore crystals form an outstanding and impressive specimen from a famous Italian locality - Bellecombe in the Aosta Valley. Super rich material from this classic locale. by Rob Lavinsky, iRocks.com – CC-BY-SA-3.0 [CC-BY-SA-3.0], via Wikimedia Commons

Clinochlore Value

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Clinochlore Information

DataValue
NameClinochlore
VarietiesKämmererite, Seraphinite
Crystallography Monoclinic, pseudo hexagonal
Refractive Index 1.571 - 1.600
Colors Sheridanite: Blackish green, Bluish green, Olive green; Kämmerite: Red, Purple
Polish Luster Vitreous
Fracture Luster Vitreous, pearly
Fracture Uneven
Hardness 2 - 2.5
Toughness Good
Specific Gravity 2.55 - 2.75
Birefringence Sheridanite 005 – .011, Kämmerite .003
Cleavage Perfect 1 direction
Stone SizesFaceted Kämmerite to 2 carats, Sheridanite cabs to large
Heat SensitivityYes
Enhancements None
Transparency Transparent to translucent
UV LongNone
UV ShortNone
Absorption Spectrum Not diagnostic
Phenomena None known
Formula(Mg,Fe++)5Al(Si3Al)O10(OH)8
Pleochroism Sheridanite: Strong, pale green, colorless, pale yellowish green, pale brownish yellow; Kämmerite: Strong, violet, red

Clinochlore is a family of minerals in the chlorite group. Varieties include Colerainite, Kämmerite, Pennine, Penninite, Prochlorite, Ripidolite, and Sheridanite. To date, only Kämmerite and Sheridanite are known to have been cut as gemstones.

Names

  • Clinochlore from the Greek klino – “oblique” and chloros – ” green.”
  • Ripidolite from the Greek rhipis – “fan” and lithos – “stone.”
  • Pennine from the Pennine Alps, Italy

Variety Names

  • Clinochlore – green
  • Colerainite
  • Kammererite – Red to purple
  • Pennine
  • Penninite
  • Prochlorite
  • Ripidolite
  • Sheridanite Dark green, rich in chromium