Bloodrock Posted August 26, 2018 Share Posted August 26, 2018 This seemingly unremarkable specimen when fractured reveals a cache of black glistening pebbles. The contents vary in size; all are smooth, black with traces of white coloring and have a polished appearance. The matrix material has a glass like reflective quality when fractured. Quote Link to comment Share on other sites More sharing options...
Morlock Posted August 26, 2018 Share Posted August 26, 2018 Obsidian. 1 Quote Link to comment Share on other sites More sharing options...
d_day Posted August 26, 2018 Share Posted August 26, 2018 The black is obsidian, the grey is perlite. 3 Quote Link to comment Share on other sites More sharing options...
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