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Posted in response to Unknown rock from Roy Johnson on August 16, 2010 at 09:09:49:

Re: Unknown rock

Roy,

It looks somewhat like obsidian, a variety called snowflake obsidian, but obsidian is much glossier and fractures sharply. Was it perhaps stream worn?

From Dennis - August 17, 2010 at 08:13:18

Message: 69311



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