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Mineralpedia Details for Celadonite

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Celadonite

Celadonite

Formula
KMgFe3+Si4O10(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Earthy, Aggregates, Encrustations 
Cleavage
Perfect, None, None 
Luster
Earthy (Dull) 
Color
gray green, bluish green 
Streak
greenish white 
Class
Monoclinic - Prismatic 
Fracture
Earthy 
Hardness
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Celadonite from near Wadsworth, Washoe Co., Nevada, United States

Celadonite
            from near Wadsworth, Washoe Co., Nevada, United States

Phyllosilicate - Monoclinic - Mica group member. Ordinary (True or Common) Mica - Dioctahderal. Mostly or ideally (?) aluminum free mica, with Mg & Fe in the (M) positions. For more information on Mica minerals and other phyllosilicates please reference our article - Click Here.

Per (Bernard and Hyrsl) usually as earthy fillings in amygdules and replacement after Augite. Very rare in minute crystals. Also as micaceous scales, widespread in formations of altered volcanic rocks on intermediate basaltic compositions and commonly associated with Montmorillonite.

This is a large chuck of basalt with the typical, dull green earthy celadonite filling amygdules.

Comes with old Hatfield Goudey specimen collected Sept. 9, 1949.

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Celadonite from Union Carbide mine, Wilson Springs, Garland Co., Arkansas, United States

Celadonite
            from Union Carbide mine, Wilson Springs, Garland Co., Arkansas, United States

Dark green, very tiny, flakes of Celadonite encrusting beautiful yellow and brown banded agate. In some areas of the agate Pyrite crystal to 0.75mm can be seen.

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