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Post by paulshiroma on Mar 22, 2017 22:13:02 GMT -5
A friend of mine is a geologist for a local engineering company. Their current project is up in the San Gabriel Mountain range north of Los Angeles. Earlier this year, they were doing some core samples down to about 2,500 feet for analysis – of what, I don’t recall – but he dropped by and asked me to slab this piece as he wanted to give out the slabs to the team members working on the project. The material looks a bit like granite but is somewhat softer (I think he mentioned 5 or 6 on the Mohs scale). It cuts easily enough. It’ll make for nice gifts/conversation pieces when done.   Note the depth marker 855 feet.  EDIT Here's the core after slabbing. Interestingly, it has some green minerals in it that add a nice contrast to the gray/purple color.      While I was at it, I took out another piece of that "purple cow agate" (I must've misread the label) and made a few cuts.  Thanks for looking. Paul |
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Mar 23, 2017 10:58:29 GMT -5
That is cool.
Not the grano-diorite found on the surface.
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Post by roy on Mar 23, 2017 11:05:28 GMT -5
looks like that blue g stuff thats being sold down there
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NDK
Cave Dweller 
Member since January 2009
Posts: 9,440
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Post by NDK on Mar 23, 2017 12:37:10 GMT -5
That's an awesome project, Paul. Really neat keepsake too!
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Post by Pat on Mar 23, 2017 15:42:53 GMT -5
Wow! I love cores. Mine are all about the same length, but about 1" thick. So neat to see what is down "there"! Thanks.
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Post by paulshiroma on Mar 23, 2017 21:40:05 GMT -5
That's an awesome project, Paul. Really neat keepsake too! Thanks, NDK. Being a geologist, he gets to go out to some pretty remote sites and often brings stuff back. He and I are trying to coordinate schedules and do a trip out to some of the places he's been while working. His son is Andrew's classmate (that's how we met) so our schedules get a bit crazy hauling the boys to basketball, rock climbing, etc. |
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Post by paulshiroma on Mar 23, 2017 21:43:31 GMT -5
Wow! I love cores. Mine are all about the same length, but about 1" thick. So neat to see what is down "there"! Thanks. Pat, I was admiring the ends of the sample as the cuts were so perfect. When I asked about that, he mentioned that they pressure test them and need to ensure that the ends are perfectly smooth when the put them in the press. I'll have to ask him again what the project was. |
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Post by Rockoonz on Mar 23, 2017 22:12:47 GMT -5
looks like that blue g stuff thats being sold down there Yeah, a core like that is half way to being a preform for a nice sphere, @shotgunner may be interested, I hear it's his favorite.  |
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Deleted
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Member since January 1970
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Post by Deleted on Mar 23, 2017 22:32:36 GMT -5
looks like that blue g stuff thats being sold down there Yeah, a core like that is half way to being a preform for a nice sphere, @shotgunner may be interested, I hear it's his favorite. |
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Post by johnjsgems on Mar 27, 2017 12:41:18 GMT -5
They would be nice coasters.
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Post by rockjunquie on Mar 29, 2017 11:33:53 GMT -5
That's a really cool idea and it turns out to be an interesting material, too.
edit I wonder what the black splotches are and how they were formed.
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Post by paulshiroma on Mar 30, 2017 21:44:38 GMT -5
That's a really cool idea and it turns out to be an interesting material, too. edit I wonder what the black splotches are and how they were formed. I'll be asking him when I see him next. It turned out to be pretty interesting on the inside. |
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