kozman
noticing nice landscape pebbles
Member since July 2020
Posts: 83
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Post by kozman on Sept 1, 2020 18:04:58 GMT -5
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rockstock
spending too much on rocks
Member since April 2019
Posts: 472
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Post by rockstock on Sept 1, 2020 18:14:11 GMT -5
Porophyr in rhyolite, if I used the correct words. porphyry is correct, had to look it up. Porphyry is an igneous, volcanic rock with rhyolitic chemism, composed of large, conspicuous crystals (phenocrysts) and a fine grained to glassy groundmass in which the phenocrysts are embedded.
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kozman
noticing nice landscape pebbles
Member since July 2020
Posts: 83
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Post by kozman on Sept 1, 2020 19:13:07 GMT -5
Forgot to mention it is light.
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rockstock
spending too much on rocks
Member since April 2019
Posts: 472
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Post by rockstock on Sept 1, 2020 19:55:22 GMT -5
The kinds I find tumble better than expected starting like the previous pic.
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Post by rmf on Sept 2, 2020 11:33:42 GMT -5
I am going to say a piece of brick. If it were average weight I would say a Porphyritic Rhyolite as rockstock suggested.
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