Celadonite
Celadonite is a mica group mineral, a phyllosilicate of potassium, iron in both oxidation states, aluminium and hydroxide with formula .

It crystallizes in the monoclinic system and usually forms massive aggregates of prismatic crystallites or in dull clay masses. It is soft with a Mohs hardness of 2 and a specific gravity of 3. Typically occurs as dull gray-green to bluish green masses. It forms vesicle fillings and linings in altered basaltic lavas.

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.

Common impurities are manganese, calcium and sodium (previously known as natrium).
Q114675
mica
Concept
Q7946
mineral
Concept
Q178977
phyllosilicate
Concept
Q703
potassium
Concept
Q677
iron
Concept
Q663
aluminium
Concept
Q425597
hydroxide
Concept
Q624543
monoclinic
Concept
Q41472
Mohs hardness
Concept
Q11027905
specific gravity
Concept
Q43338
basalt
Concept
Q40157
lava
Concept
Q1945737
Monte Baldo
LOC
Q2028
Verona, Italy
LOC
Q150
French
Concept
Q423034
glauconite
Concept
Q1552133
green earth
UNK
Q731
manganese
Concept
Q706
calcium
Concept
Q658
sodium
Concept
Q425142
Celadonite
Concept
1847-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1847
DATE
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
+3^^http://www.w3.org/2001/XMLSchema#decimal
3
NUMBER
subclass of
crystal system
subclass of