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Post by fernwood on Nov 13, 2017 6:06:18 GMT -5
Found this nice handful of potential tumbles in landscape rock. I think the lower left one is some type of Jasper with a Quartz pocket. The others appear to be fossilized, organic material, some are coral. Colors are pretty true, except the Quartz in the Jasper is more purple than gray. It also would yield at least one nice cab, or a pendant/earrings set. The white material in the one at 12:00 o’clock, reminds me of pumice. Very soft. The red portions are very hard. That may be more of a display than a tumble. 21 354There is a lot more of similar material where I found these. Any thoughts on positive ID?
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nemesis21
noticing nice landscape pebbles
Member since August 2017
Posts: 88
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Post by nemesis21 on Nov 13, 2017 12:56:49 GMT -5
From what I've been told they are all considered chert. Although, I really don't know what true difference there is between chert and jasper besides color.
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Post by Peruano on Nov 13, 2017 14:27:59 GMT -5
Taking the risk of wild guesses on the 4 rocks depicted. I'd agree with nemesis21 that the brown one is a flint/chert relative. For some reason the others strike me as quartzite - they appear to be a bit more grainy, the pattern is a diffuse blurred one, and they have the color of oxidized silicate material.
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Post by rmf on Nov 19, 2017 11:02:42 GMT -5
Do you know where in WI the gravel came from? The 12 oclock rock is chert as perviously stated and I agree the 1 or 2 oclock rock looks like Quartzite. the 7 oclock rock is chert with some agate and the one around 5 oclock is quartzite. look for mica in the quartzites. the gas bubles in chert are a dead give a way and the same area with the bubbles is chalky as well. The quartzites tend to have a sugary texture/look.
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Post by fernwood on Nov 20, 2017 6:21:16 GMT -5
Guessing it came from Portage County.
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