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Axinite
Axinite
is a blue, violet-blue, brownish or reddish-brown
mineral
composed of
calcium
aluminum
boro
-
silicate
. Mohs hardness is 6.5-7.
Refractive index
is 1.68-1.723. Specific gravity is 3.26-3.41. Crystal structure is triclinic.
wikipedia.org
dumped 2003-03-17 with
terodump