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any idea's what this might be?

0 votes

asked Jan 4, 2018 by Stevejbrown (140 points)

2 Answers

0 votes
Obsidian, looks like it anyway.
answered Jan 6, 2018 by Weasel (58,980 points)
0 votes
Probably goethite, from visual identity. Can you do a streak test on it? That could definitely rule in or out my suggestion.
answered Apr 30, 2018 by hershel (52,820 points)
the streak is dark brown
Dark brown / brownish red would indicate hematite.