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Ferroceladonite coatings
© Doug Merson
Ferroceladonite coatings
© Doug Merson
Ferroceladonite coatings
© Modris Baum
Fe2+Fe2+Si20(OH)
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; 2/
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/cm
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
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Ferroceladonite coatings
© Modris Baum
Ferroceladonite coatings
© Elmar Lackner