|
|
Post by Toad on Apr 3, 2022 16:23:08 GMT -5
Over 15#. One large piece of green tree agate. The rest is purply/gray Texas flint. Very solid. $37 includes shipping.  |
|
nursetumbler
Cave Dweller 
Member since February 2022
Posts: 994 
|
Post by nursetumbler on Apr 4, 2022 12:57:40 GMT -5
I'd like it Todd
|
|
|
|
Post by Toad on Apr 4, 2022 13:27:28 GMT -5
All yours, Kelly.
|
|
nursetumbler
Cave Dweller
Member since February 2022
Posts: 994
|
Post by nursetumbler on Apr 7, 2022 13:20:08 GMT -5
Received my box today. Cant wait to tumble it
|
|
nursetumbler
Cave Dweller
Member since February 2022
Posts: 994
|
Post by nursetumbler on Apr 7, 2022 13:35:42 GMT -5
Can anybody tell me HOW to break flunt without causing inner fractures or is that not even an issue???
|
|
nursetumbler
Cave Dweller
Member since February 2022
Posts: 994
|
Post by nursetumbler on Apr 7, 2022 16:00:53 GMT -5
Can anybody tell me HOW to break flunt without causing inner fractures or is that not even an issue???
|
|
|
|
Post by Toad on Apr 8, 2022 3:53:18 GMT -5
My experience is that flint hammer-breaks very easily. If it fractures, it breaks apart - not leaving a whole rock with a fracture in it. The tumbler takes care of the rest.
|
|
nursetumbler
Cave Dweller
Member since February 2022
Posts: 994
|
Post by nursetumbler on Apr 8, 2022 12:16:16 GMT -5
My experience is that flint hammer-breaks very easily. If it fractures, it breaks apart - not leaving a whole rock with a fracture in it. The tumbler takes care of the rest. Thanks Todd |
|
Tommy
Administrator 
Member since January 2013
Posts: 12,987
|
Post by Tommy on Apr 8, 2022 14:18:36 GMT -5
My experience is that flint hammer-breaks very easily. If it fractures, it breaks apart - not leaving a whole rock with a fracture in it. The tumbler takes care of the rest. Thanks Todd There is an art to breaking rocks by holding it (with good gloves) and striking it on the top side of 90 degree angles breaking off tumbler sized pieces - I think flint would be a good material to do this with - sort of like knapping but getting larger chunks off. jamesp had a video of him breaking up chunks of coral in this manner - maybe he can chime in? |
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,607
|
Post by jamesp on Apr 8, 2022 19:48:03 GMT -5
There is an art to breaking rocks by holding it (with good gloves) and striking it on the top side of 90 degree angles breaking off tumbler sized pieces - I think flint would be a good material to do this with - sort of like knapping but getting larger chunks off. jamesp had a video of him breaking up chunks of coral in this manner - maybe he can chime in? I had a Vimeo video Tommy but they started charging fees and I left them. You are correct nursetumbler. It takes little force to knock chips off of a block of flint or chert. Better if you strike the cantilevered ledge at about a 90 degree angle. If the ledge reverses and sticks out more on the bottom simply rotate the chunk and strike the reversed cantilevered ledge. Softer brass or copper hammers prevent multiple fractures propagations, hard steel sends/creates more fractures. I prefer anneal softened steel hammer heads for Mohs 7 materails. |
|
nursetumbler
Cave Dweller
Member since February 2022
Posts: 994
|
Post by nursetumbler on Apr 8, 2022 20:14:06 GMT -5
There is an art to breaking rocks by holding it (with good gloves) and striking it on the top side of 90 degree angles breaking off tumbler sized pieces - I think flint would be a good material to do this with - sort of like knapping but getting larger chunks off. jamesp had a video of him breaking up chunks of coral in this manner - maybe he can chime in? I had a Vimeo video Tommy but they started charging fees and I left them. You are correct nursetumbler. It takes little force to knock chips off of a block of flint or chert. Better if you strike the cantilevered ledge at about a 90 degree angle. If the ledge reverses and sticks out more on the bottom simply rotate the chunk and strike the reversed cantilevered ledge. Softer brass or copper hammers prevent multiple fractures propagations, hard steel sends/creates more fractures. I prefer anneal softened steel hammer heads for Mohs 7 materails. Thank you jamesp. |
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,607
|
Post by jamesp on Apr 9, 2022 7:51:04 GMT -5
I had a Vimeo video Tommy but they started charging fees and I left them. You are correct nursetumbler. It takes little force to knock chips off of a block of flint or chert. Better if you strike the cantilevered ledge at about a 90 degree angle. If the ledge reverses and sticks out more on the bottom simply rotate the chunk and strike the reversed cantilevered ledge. Softer brass or copper hammers prevent multiple fractures propagations, hard steel sends/creates more fractures. I prefer anneal softened steel hammer heads for Mohs 7 materails. Thank you jamesp. This guy is a master: |
|
Nov 14, 2024 18:17:57 GMT -5
*
Nov 14, 2024 18:17:57 GMT -5
*
Nov 15, 2024 17:44:51 GMT -5
Nov 15, 2024 17:44:51 GMT -5
