A 3.5 cm crystal of columbite aesthetically perched on a miniature-size pegmatite matrix of muscovite & albite. John Caswell (catalog #1511) acquired this historic specimen from the Newberry collection in 1878; more recently, this specimen was acquired by me in 2001 from Steve Chamberlain, who received it from Ron Bentley in 1980. 5.7 x 4.7 x 3.8 cm
Attribution: Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
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