15" Huge Book Jet Black BIOTITE MICA Crystal Sheets Bear Lake Ontario for sale

$75.00
Product Code: EB0618BIOT4
Availability: In Stock
 
Qty: + -
Location Bear Lake Diggings, Monmouth Township, Ontario, Canada
Size 15.0" x 8.4" x 0.3"
Suggested Stand X-Large 8" Easel Stand

This is an extra large crystal "book" of biotite mica, the variety of mica that is black due to iron in its chemical formula. I collected this piece myself at the Bear Lake Diggings on a mining trip in 1999. The crystal is made up of thin sheets, a crystal habit referred to as lamellar. Thinner slices could be peeled off of the crystal, if you wanted to.