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Post by hardcorerockhounds on Nov 18, 2009 16:45:17 GMT -5
Hello. We are new to this site and finally come across a rock that we haven't a clue. A little history, it came from the UP of Michigan. It has brilliant purples and greens and probably a 5 or 6 on the mohs scale. Can someone advise...
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Post by hardcorerockhounds on Nov 18, 2009 16:59:35 GMT -5
.....and if I could upload the picture, it might make it easier to identify, eh? Attachments:
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Post by lauriesrocks on Nov 18, 2009 20:48:43 GMT -5
Since this is from the UP and the hardness is somewhat less than agate, I would postulate that it is an impure datolite nodule. The purer datolite nodules from this area are expensive and highly sought after, usually with a cream color with a pastel pink tint. This one seems to have various iron oxides swirled in with the datolite. Of course without seeing it in person I cannot be positive, but I have seen numerous of these nodules and yours is similar in many respects.
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Post by hardcorerockhounds on Nov 18, 2009 23:34:27 GMT -5
Thanks for the reply. FYI, it weighs about 4 pounds and is 6" by 5", it also has "agate faces" on it.
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Post by geodepat on Nov 21, 2009 20:26:06 GMT -5
If the colors are as nice as you say I would slab it and cab it.  |
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Post by hardcorerockhounds on Nov 23, 2009 16:35:44 GMT -5
I can slab it, however, I can't cab it.
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