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Graftonite
Graftonite
is an
iron
,
manganese
,
calcium phosphate
mineral
with formula:
3
2
. It forms
lamellar
to
granular
translucent
brown
to red-brown to
pink
monoclinic
prismatic
crystals
. It has a
vitreous
luster
with a
Mohs hardness
of 5 and a
specific gravity
of 3.67 to 3.7.
It was first described from its
type locality
of
Melvin
Mountain
in
the town
of
Grafton
, in
Grafton County, New Hampshire
.
