Green crystals of heulandite which owe their green colour to many tiny inclusions of celadonite
General
Category
Micas Phyllosilicate
Formula (repeating unit)
K(Mg,Fe2+ )(Fe3+ ,Al)[Si 4O 10](OH) 2
IMA symbol
Cel[1]
Crystal system
Monoclinic
Crystal class
Spheroidal (2) (same H-M symbol)
Space group
C2
Identification
Color
Blue-green to olive to applegreen
Cleavage
perfect on {001}
Tenacity
Fragile
Mohs scale hardness
2
Luster
Waxy, dull, earthy
Diaphaneity
Translucent
Specific gravity
2.95 - 3.05
Density
2.95 - 3.05
Optical properties
Biaxial (-)
Pleochroism
Visible
2V angle
5°- 8°
Common impurities
Mn, Na, Ca
Other characteristics
Radioactive 9.11% (K)
References
[2][3][4]
Celadonite is a mica group mineral, a phyllosilicate of potassium, iron in both oxidation states, aluminium and hydroxide with formula K(Mg,Fe2+ )(Fe3+ ,Al)[Si 4O 10](OH) 2.
It crystallizes in the monoclinic system and usually forms massive aggregates of prismatic crystallites or, more commonly, in dull clay masses. It is soft with a Mohs hardness of 2 and a specific gravity of 3. It forms vesicle fillings and linings in altered basaltic lavas. Early research suggests this mineral has ties to weakly metamorphosed plutonic rocks during formation, and is also found with montmorillonite clays or zeolite crystals.[5] Association with zeolites may indicate these minerals favor the same underlying conditions of crystal growth.[5]
It was first described in 1847 on Monte Baldo, near Verona, Italy. The name is from the French celadon, for sea-green. It is one of two minerals, along with glauconite, used in making the pigment known as green earth.[6]
Common impurities are manganese, calcium and sodium (previously known as natrium).
Celadonite is a mica group mineral, a phyllosilicate of potassium, iron in both oxidation states, aluminium and hydroxide with formula K(Mg,Fe2+ )(Fe3+...
verte and Verona green, is an inorganic pigment derived from the minerals celadonite and glauconite. Its chemical formula is K[(Al,Fe3+),(Fe2+,Mg)](AlSi3,Si4)O10(OH)2...
colors, though certain minerals including glauconite, melanterite, and celadonite can also give soil a green color. Glauconite soils form from select marine...
and Verona green. It is an inorganic pigment derived from the minerals celadonite and glauconite. Lists of colors W3C TR CSS3 Color Module, HTML4 color...
and Verona green. It is an inorganic pigment derived from the minerals celadonite and glauconite. Hooker's green is a dark green color created by mixing...
solid solutions from illite to aluminoceladonite and from glauconite to celadonite". American Mineralogist. 95 (2–3): 348–361. Bibcode:2010AmMin..95..348D...
recognized mineral name representing the series between muscovite and celadonite. The silica content of phengite has been proposed as a geobarometer for...
may be orange, brown, yellow, brick-red, or green due to inclusions of celadonite. It varies from transparent to translucent. Isomorphous with heulandite...
at Mumbai. Green Stilbite-Ca, which gets its color from inclusions of celadonite Clustered on a matrix of white chalcedony are a group of light salmon...
Global Information
Radioactive 9.11% (K)