Celadonite
Chemical Formula	K(Mg,Fe2+)(Fe3+,Al)[Si4O10](OH)2
Species	Silicates
Crystal System	Monoclinic
Mohs Scale	2
Specific Gravity	3
Color	Blue-green, olive green, apple green
Luster	Dull
Refractive Index	n = 1.606 - 1.625 n = 1.630 - 1.662 n = 1.579 - 1.661
Diaphaneity	Translucent
Cleavage	Perfectperfect on
Crystal Habit：Minute micaceous scales or earthy aggregates
Geological Setting：Replaces ferromagnesian minerals in altered intermediate to mafic igneous rocks, zeolite grade metamorphic rocks, amygdaloidal fillings in basalts and andesites.