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Post by snowmom on May 21, 2014 8:16:41 GMT -5
my copper penny scratched it easily (the green stuff) and it leaves a greenish streak. I can scratch it with my fingernail.. so thinking chrysocolla?? Won't be tumbling this one!
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Post by mohs on May 21, 2014 9:15:13 GMT -5
that's interesting pictures can be deceiving chrysocolla wouldn't have been my guess your description indicates that it is tho those spots of blueish is what I'm most familiar as chrys..
do you know if the rock is from your area? Michigan right?
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plumberinaz
starting to spend too much on rocks
Member since June 2013
Posts: 186
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Post by plumberinaz on May 21, 2014 9:44:27 GMT -5
Doesn't look like chrysocolla to me... Not sure what it is? Its a interesting rock for sure! Hope someone else with more knowledge then me can help ya out!
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Post by snowmom on May 21, 2014 10:43:29 GMT -5
maybe talc stained by proximity to copper. But( red faced here) the brownish streaks are soft too! not hard at all... ( I remembered to check them out after this original post- sheesh! ) I think they are calcification and are not very deep. The bluegreen stuff may be harder in the center once it is cut, but I don't have a saw. It is from Michigan and found in natural moraine/till gravel common to the area, we are just east of the tip of the mitt and have a lot of stuff brought down from Canada with the glaciers that formed the Great Lakes, in this case, Huron. I doubt that green rock was formed here, we seem to have not much but limestone and Devonian era fossils that are native to us. But I find loads of stuff that has been brought from the north (UP and east into Canada) by the ancient glaciers.
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Post by phil on May 21, 2014 13:29:06 GMT -5
Don't know what it is, but it doesn't look like any chrysocolla I've ever cut. I see no blues or greens in that rock at all.
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Post by snowmom on May 21, 2014 16:30:54 GMT -5
and the scratch test is wrong, my book says chrysocola leaves a white streak. This is greenish bluish greyish No, the photo doesn't look at all like that stone... but my book said chrysocolla could also be dark green. malachite by default, but not the quartz shiny stuff you see posted from Arizona. So much of the stuff I find has the outside decomposed due to glacial wear or eons in the water at the beach, let alone being rounded so you can't see crystals in their 'natural' form. confuses a newbie, that's for sure. And then there are all the mixes!
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Post by snowmom on Jun 8, 2014 5:48:45 GMT -5
resurrectint this old thread in light of some recent Jade discussions because last night I read that Jade turns to talc as it ages and morphs. Under all of that powder there may be jade. This rock has been sent to 1Dave for closer examination.
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