whyofquartz
spending too much on rocks
So, Africa is smaller than I expected...
Member since December 2019
Posts: 316
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Post by whyofquartz on Dec 9, 2019 12:54:10 GMT -5
I have this rock I cut up. I strongly suspect it is some form of Urbanite. It smells 'petroleumy' on the cut surface but the matrix seems really hard. Can someone please comfort me with the lie that i didn't just cut up a lump of road tar? Thanks I still intend to tumble it, but not with anything I really want to keep. I am going to do an all experimental batch of this and some glass that melted in my charcoal forge by accident(at first)
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Post by RocksInNJ on Dec 9, 2019 13:30:56 GMT -5
I’d check the hardness. Don’t think I’d want to risk any tar in my barrels.
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whyofquartz
spending too much on rocks
So, Africa is smaller than I expected...
Member since December 2019
Posts: 316
|
Post by whyofquartz on Dec 9, 2019 13:39:43 GMT -5
I’d check the hardness. Don’t think I’d want to risk any tar in my barrels. well the pebble density is a little high and for some reason I didn't think while sitting in my garage to grab a nail or screw but i can't drive my pocket knife into it. i will go at it with a safer source of steel and see what i can do. may be hit it with the corner of an old file. i might also hit one with a little petroleum and another with some heat. it didn't gum up on my blade though
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Dec 9, 2019 21:55:09 GMT -5
There is such a thing as bituminous breccia/conglomerate that are natural, though there are also man-made conglomerates that can look very similar. The mix of sharps and rounded in yours makes me think more of man-made. Was it found in an area with bituminous coal, bitumen, or tar/oil deposits? That might raise some other possibilities.
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whyofquartz
spending too much on rocks
So, Africa is smaller than I expected...
Member since December 2019
Posts: 316
|
Post by whyofquartz on Dec 10, 2019 7:44:07 GMT -5
I am over the Eagleford Shale, i know that doesn't narrow it down much. It was in my dirt driveway which comes off a paved road but the gravel in the asphalt is your standard white limestone asphalt rock.I am south of San Antonio Texas in sand, iron, flint, and Agate. I think i have unknowingly tumbled some before, stuck to another rock, and it turned out ok so far.
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