6.2" Book of Black Iron-Rich BIOTITE MICA Thin Layered Crystal Ontario for sale

$50.00
Product Code: EB0419BIOT4
Availability: In Stock
 
Qty: + -
Location Bear Lake diggings, Monmouth Township, Haliburton Co., Ontario, Canada
Size 6.2" x 4.2" x 0.6"
Suggested Stand Medium 5" Easel Stand

This is a large, lustrous book of iron-rich, midnight black biotite mica. The biotite is formed in thin lamellae sheets that are layered one on top of another, and which split very easily.  The name biotite has been discredited by the AMA, but it continues to be widely accepted because it has been used for centuries. I collected this piece myself at the Bear Lake Diggings on a mining trip in 1999. The locality is now closed to collecting.