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by James Tanner August 1 2012, 14:16
Quartz Vug http://t.co/eDFn2R5c James Tanner (@Genealogysstar)August 01, 2012
Quartz Vug http://t.co/eDFn2R5c
Quartz Vug
Mineral crystals grow in empty spaces in rocks called vugs if they are large and geodes if they are small. In the case of geodes, the crystal filled space is surrounded by a rock matrix and sometimes the rock matrix is in the form of a nodule.
http://nblo.gs/AtQUj
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