Help me identify this rock.
December 14, 2012 11:03 AM Subscribe
Help me identify this rock!
posted by _DB_ to science & nature (9 answers total) 1 user marked this as a favorite
I figured this is one of those ask-metafilter-and-have-an-answer-in-ten-minutes situations.
I had a student show up with this rock and ask me if I could tell them what it is. I have a passing interest in geology but this isn't something I've seen before. My first guess was some sort of halite but it seems too soft (the thin crystal pieces break easily and are scratched with a fingernail). It has a satiny feel to it when you rub along the grain.
Thanks in advance, you guys are awesome.