jamesp
Cave Dweller 
Member since October 2012
Posts: 36,603
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Post by jamesp on Feb 11, 2020 6:06:02 GMT -5
RTH is famous ! My hand is in this Ohio metal detecting article about railroad marbles lol ! Owens Corning used to ship train cars full of glass marbles for re-melt to fiberglass fibers. Old Owens factory near my home. www.ohiometaldetecting.com/railroad-marbles.html |
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,603
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Post by jamesp on Feb 11, 2020 6:39:22 GMT -5
Hertzian impact fracture in glass. One of toiv0's pieces of glass looks like a Hertzian cone fracture.  Slag glass is often removed with hammers creating Hertzian cone fractures. I have some ~40 pound glass Hertzian cones created when Owens Corning hires track hoes with giant jack hammers to break the 3' of accumulated glass in their kilns annually. Consider early man: Hertzian impact fractures are also found in amorphous cryptocrystalline quartz like chert and flint. About the only way to generate a high speed impact to create a Hertzian cone is for a human to create such a high speed mechanical impact with some sort of hammer. Or rock tumblers that use hammers to break cryptocrystalline agates/cherts/jaspers into tumbles(causing half moons and full moon fractures visible after tumble polish). Archeologists are well aware that the finding of a Hertzian cone fracture in chert or flint is a sure sign of early man.   |
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,603
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Post by jamesp on Feb 11, 2020 7:48:31 GMT -5
toiv0 - If you find slag shaped like these you can be quite sure it was hit with a hammer. These were jack hammered out of the bottom of a giant Owens kiln. Jack hammer mounted on a track hoe commonly used for rock/concrete breaking. Impact struck left side 
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Post by RickB on Feb 11, 2020 7:51:22 GMT -5
Here’s the chunk I found behind the old glass factory next door the other day. /pic5221664.jpg) Quit touching it with you fingers. You're making it glow. |
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Post by RickB on Feb 11, 2020 7:53:17 GMT -5
Hertzian cones are a knappers best friend.
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Post by fernwood on Feb 11, 2020 8:11:36 GMT -5
Here’s the chunk I found behind the old glass factory next door the other day. Quit touching it with you fingers. You're making it glow.  |
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,603
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Post by jamesp on Feb 11, 2020 10:35:31 GMT -5
Hertzian cones are a knappers best friend. Savanah River chert is known for them Rick. That is a vast ancient chert mining zone. |
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Post by toiv0 on Feb 11, 2020 12:59:08 GMT -5
Here’s the chunk I found behind the old glass factory next door the other day. I tried to turn this 180 but my edit wouldn't let me. Maybe some else haas that technology. It erily looks like your self portrait. Is there something you're not telling us. |
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Post by toiv0 on Feb 11, 2020 13:03:24 GMT -5
RTH is famous ! My hand is in this Ohio metal detecting article about railroad marbles lol ! Owens Corning used to ship train cars full of glass marbles for re-melt to fiberglass fibers. Old Owens factory near my home. www.ohiometaldetecting.com/railroad-marbles.htmlPretty cool jamesp. Article also mentions taconite marbles. Can pick them up by the bucket around the tracks at home. |
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Post by RocksInNJ on Feb 11, 2020 13:23:40 GMT -5
Here’s the chunk I found behind the old glass factory next door the other day. I tried to turn this 180 but my edit wouldn't let me. Maybe some else haas that technology. It erily looks like your self portrait. Is there something you're not telling us. Sshhhhh, it’s actually an alien egg that glows under incubation. Signaling that the hatching process is about to begin. |
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Post by RocksInNJ on Feb 11, 2020 13:26:09 GMT -5
RTH is famous ! My hand is in this Ohio metal detecting article about railroad marbles lol ! Owens Corning used to ship train cars full of glass marbles for re-melt to fiberglass fibers. Old Owens factory near my home. www.ohiometaldetecting.com/railroad-marbles.htmlThe old glass factory next to me used to be an Owens and then Anchor Hocking. Now it’s just subdivided out to a bunch of different businesses. The building goes all the way back to the early 1900’s. |
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,603
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Post by jamesp on Feb 11, 2020 16:27:03 GMT -5
Wow, those are fine. To be proud of. Especially if you dug them amygdule. Don't know why I thought they were fused in glass. I knew an older couple that flew to Australia every year and bought back opal every year. They were stored in wet clay. Talented lapidarian. Cut, mounted and sold them. He did well for himself. Lived high off those opals. |
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,603
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Post by jamesp on Feb 11, 2020 16:43:45 GMT -5
RTH is famous ! My hand is in this Ohio metal detecting article about railroad marbles lol ! Owens Corning used to ship train cars full of glass marbles for re-melt to fiberglass fibers. Old Owens factory near my home. www.ohiometaldetecting.com/railroad-marbles.htmlPretty cool jamesp. Article also mentions taconite marbles. Can pick them up by the bucket around the tracks at home. I will keep an eye out for the taconite marbles. Like the spear point with the inclusion. |
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Post by RickB on Feb 11, 2020 16:46:50 GMT -5
jamesp I'll be working on your spear point with inclusions soon.
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Post by beefjello on Feb 16, 2020 13:53:53 GMT -5
I tried to google the coca cola glass and got no where. Weird so it must be true. I could only find one reference to that glass, which was an item listed on Ebay. EXTREMELY RARE COCA COLA GLASS SPHEREA rock dealer friend told me that the glass was from a Coca-Cola plant in Texas that burned down in 1950. Apparently all the molten glass ran down into the basement where it was left to cool down. They had such a problem with trespassers taking the glass, that they ended up bulldozing the pit to prevent more theft. A bunch of the glass ended up on the lapidary market for a while. Hey nice to finally get an ID on this chunk I picked up in a collection years ago.   |
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