8" Large Book Dark Black BIOTITE MICA Crystal Sheets Bear Lake Ontario for sale

$50.00
Product Code: EB1018BIOT4
Availability: In Stock
 
Qty: + -
Location Bear Lake Diggings, Monmouth Township, Ontario, Canada
Size 8.0" x 5.8" x 1.0"
Suggested Stand Medium 2.5" Peg Stand

Here is a large book of iron-rich, midnight black biotite mica. Biotite forms in thin lamellae sheets that are layered one on top of another, and which split apart into individual leafs very easily.  The name biotite has been shunned by the AMA, but it continues to be widely used because it has been used for centuries. I collected this piece myself at the Bear Lake Diggings on a mining trip in 1999.