oldschoolrocker
fully equipped rock polisher
Member since January 2019
Posts: 1,540
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Post by oldschoolrocker on Jun 14, 2021 10:19:19 GMT -5
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Brian
fully equipped rock polisher
Member since July 2020
Posts: 1,506
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Post by Brian on Jun 14, 2021 10:35:09 GMT -5
I’m no help with the IDing but had to say that is some pretty road gravel they were using! It looks to be a nice variety as well.
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Post by Pat on Jun 14, 2021 10:43:23 GMT -5
I don't know. Your location description sounds like the same for some California rhodonite, but it doesn't look like any rhodonite I've ever seen. Interesting.
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Post by HankRocks on Jun 14, 2021 11:17:21 GMT -5
It looks similar to some silicified clay concretions I have picked up. They were very soft and would not polish. Maybe these are part of a silicified clay layer. Once you get near the Huntsville/Navasota area you start seeing a lot of soft layer formations. Never found any that were lapidary quality, just interesting. Besides I was always looking for petrified wood and palm wood.
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oldschoolrocker
fully equipped rock polisher
Member since January 2019
Posts: 1,540
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Post by oldschoolrocker on Jun 14, 2021 11:23:14 GMT -5
I’m no help with the IDing but had to say that is some pretty road gravel they were using! It looks to be a nice variety as well. Haha yeah that's what I thought. It's several hundred yards long and probably a foot or more deep all made from this type of rock. And lots of pieces in the 5-10lb range too. It's so quick to cut up and grind that I been thinking up all sorts of projects I wanna try with it.
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oldschoolrocker
fully equipped rock polisher
Member since January 2019
Posts: 1,540
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Post by oldschoolrocker on Jun 14, 2021 11:44:59 GMT -5
HankRocks I was actually thinking could be something like that. Tho the exterior looked like regular rocks.. there are lots with crystal pockets on the exterior and most have a sortof sparkle to the material before sanding and polishing.. It is quite messy when cutting. Water turns to a super fine sand/mud leaving lots of white rock dust everywhere water touches. But so far most of what I've tried to quickly grind and shine up has gotten a decent polish. This picture shows the polish i got on a piece from there(not included in above pics)
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oldschoolrocker
fully equipped rock polisher
Member since January 2019
Posts: 1,540
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Post by oldschoolrocker on Jun 14, 2021 11:50:50 GMT -5
I don't know. Your location description sounds like the same for some California rhodonite, but it doesn't look like any rhodonite I've ever seen. Interesting. I figured being construction purposed rock and the sheer amt of it that it would be something they didn't have to truck in from too far out. But also haven't seen any similar rock offered online at local rock yards.. so guess anything is possible!
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oldschoolrocker
fully equipped rock polisher
Member since January 2019
Posts: 1,540
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Post by oldschoolrocker on Jun 15, 2021 11:35:47 GMT -5
I updated the first post with pic of the rough rock and cpl more slab pics of more variation of color and patterns in case that helps anyone to ID what they might be
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lookatthat
Cave Dweller
Whatever there is to be found.
Member since May 2017
Posts: 1,360
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Post by lookatthat on Jun 15, 2021 12:45:07 GMT -5
Puddingstone?
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Post by jasoninsd on Jun 15, 2021 18:32:05 GMT -5
Good Golly Miss Molly! Those are some stunning pieces of gravel! Such variety in those! That's pretty cool!
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oldschoolrocker
fully equipped rock polisher
Member since January 2019
Posts: 1,540
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Post by oldschoolrocker on Jun 16, 2021 20:27:05 GMT -5
So I'm thinking maybe a colorful limestone or similar. It fizzes in vinegar and has a specific gravity somewhere around 2.7, I think. That was done with my digital scale that only measures whole grams...
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oldschoolrocker
fully equipped rock polisher
Member since January 2019
Posts: 1,540
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Post by oldschoolrocker on Jun 21, 2021 10:49:16 GMT -5
Ok, so after lots of looking around online at local rock yards I found only one possible match on size and shape. Also so happens to be relatively close to where the rocks were found. Pic looks identical identical how the rock looks before a good rinse and matches with specific gravity snd acid tests - its...limestone!
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