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Post by snowmom on Jul 9, 2014 16:08:46 GMT -5
these two rocks come from the same beach. collected on different days. (red one with bubble on one end and swirl on the other in group shot) and the green rock with bubble on one end and swirl on the other. See the similarities?
did the stuff that made these rocks come out hot and as it cooled swirl and break off into the water? The bubble ends look like pegmatites, which have then transformed into these swirled rocks on the other end... I am thinking some sort of jasper, there is no quartz look to them at all, though the green on the end of the one is semi translucent. opinions??? comments?
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Fossilman
Cave Dweller
Member since January 2009
Posts: 20,688
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Post by Fossilman on Jul 9, 2014 16:45:00 GMT -5
looks like jasper's....Don't the colors go by what minerals were in the water during the transition phase of the rock,fossil or hardened minerals...
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Post by manofglass on Jul 9, 2014 17:05:08 GMT -5
A lot of the stones from Lake Huron have a yellow tint what you see on the outside is not always the same inside when it is cut
walt
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Post by snowmom on Jul 9, 2014 17:07:28 GMT -5
I think the red one has picked up surface staining from iron in the water, though why the other one didn't I don't know. The red one is greenish beneath the surface... could also be that the reddish one has been subjected to more wear or something. I was interested in the difference of the smooth bubble of stuff on one end vs the swirled more contracted end on the other. The pieces are both palm sized and weigh approximately the same.. sort of like they were coming out in drops or spurts and popping off as the stuff contracted... (too much imagination maybe?) I think color is influenced by what is in the matter to begin with even before it is heated... and then minerals in the water or earth wherever it ends up contribute over time ? doesn't some rock morph in color as it ages as well? I find brown rocks here that are green inside when you cut/break them.
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The Dad_Ohs
fully equipped rock polisher
Take me to your Labradorite!!
Member since September 2012
Posts: 1,860
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Post by The Dad_Ohs on Jul 9, 2014 17:16:58 GMT -5
They are jaspers and, while I am by no means anything even closely resembling anything that might be possibley construed as being anything approximating someone other than myself, who has no idea why I am typing all this, but anyways.... the green 2 tone looks like 1 end was buried for a long time after the other end was exposed to sun/sand/water....ie; the elements!!
I have seen a lot of different colored jaspers come from the same river, same area, sometimes next to each other.
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