8.5" Jet Black Book of Iron-Rich BIOTITE MICA Crystals Bear Lake Canada for sale

$75.00
Product Code: EB1218BIOT4
Availability: In Stock
 
Qty: + -
Location Bear Lake diggings, Monmouth Township, Haliburton Co., Ontario, Canada
Size 8.5" x 6.5" x 0.8"
Suggested Stand Large 7" Easel Stand

This is a specimen of biotite mica that is the iron-rich, dark brownish black cousin of muscovite mica. This piece is crystallized in a sharp "book" of thin sheets, layered one atop another in "slices" that can be split apart easily. The mineral name biotite is now discredited by the AMA, but it continues to be used as a group name for other minerals including phlogopite, annite, siderophyllite, and eastonite.