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Ferroceladonite crystals - click for larger pic
Ferroceladonite coatings
© Doug Merson

Ferroceladonite crystals - click for larger pic
Ferroceladonite coatings
© Doug Merson

Ferroceladonite crystals - click for larger pic
Ferroceladonite coatings
© Modris Baum

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Home > Mineral Descriptions > Ferroceladonite - (% Photos)



Ferroceladonite
K2Fe22+Fe22+Si8O20(OH)4

     Ferroceladonite was described from New Zealand in 1997. It has been known as the "green grunge" since the late '60s from MSH where it is fairly common.

PHYSICAL CHARACTERISTICS:

Color is usually green.
Luster is greasy or earthy.
Diaphaneity is translucent to opaque.
Crystal System is monoclinic; C2/m.
Crystal Habits include fine coatings and powdery masses.
Cleavage [001] is perfect.
Fracture is not apparent due to clay-like nature.
Hardness is 2 - 2.5
Specific Gravity is approximately 3.0 g/cm3.
Streak is pale green.
Associated Minerals include elpidite, epididymite, microcline and
   monazite.
Distinguishing Features: Crystal habits and color.
Origin: Named in 1997 for its ferrous content and its relation to
   celadonite.

CLASSIFICATION:

Dana System
# 71.2.2a.13

Strunz Classification
# VIII/H.10-40

REFERENCES:
AmMin 82:503-511 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
¤¤

MX
--

SS
--

MC
--

HF
--

BR
--

SX
--

FR
--

Legend

Ferroceladonite crystals - click for larger pic
Ferroceladonite coatings
© Modris Baum

Ferroceladonite crystals - click for larger pic
Ferroceladonite coatings
© Elmar Lackner