Matildite

Tiny black grains in quarz
Origin: Alaska Basin, San Juan Co., Colorado, USA
Sample size: 2.5 x 3 cm
 

Photo courtesy of: 

Diederik Visser

Diederik Visser Minerals & Petrological Services

 

Dull silvery grains within matrix. Associated with galena.
Origin: Lumsden Shaft, Cobalt, Ontario, Canada
Ex. Polak collection
Sample size: 5 x 4 x 3 cm
 

Photo courtesy of: 

Tom Loomis

Dakota Matrix Minerals

 

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