| TOURMALINE in MUSCOVITE, Bob Ingersol Mine, Keystone, South Dakota, 9 x 7 x 1.3 cm | |
 | Cabinet sized specimen of blue green Tourmaline sprays included in a book of Muscovite Mica. Interesting South Dakota specimen. At the Denver show, another dealer mentioned that years ago he bought some of these from a miner in South Dakota and after they sold well, tried to get more and the miner said that it was a limited find and no other specimens were available. Maybe this one came from those original specimens. This is from the Gil Griffin collection. |
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