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Post by joetre on Sept 26, 2012 17:22:27 GMT -5
I found this rock formation buried in a sandy hillside. It is very fragile and i can break it just by squeezing it. I would say the hardness is about a 2. Inside are a very soft powdery crystal formations. thanks for the help. Attachments:
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Post by joetre on Oct 5, 2012 14:13:51 GMT -5
Really? not even a guess? anyone? Anyone know where i can take it to get verified?
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Post by Dicky the Rockhunter on Oct 11, 2012 12:57:53 GMT -5
you might wat to show to the stst geologist
Dicky
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Post by yurash on Oct 12, 2012 7:22:55 GMT -5
It could be (a sand/clay cemented by) calcite. Try to apply some acid (e.g. vinegar). Does it "boil up"?
If not - may be hypsum.
Is "very soft powdery crystal formation" soluble in water?
If yes - see haloids, nitrates, borates, Na/Mg sulphates...
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jesss
Full Member
Posts: 10
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Post by jesss on Nov 16, 2012 16:05:31 GMT -5
kind of looks gypsum related - might want to search around that idea
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