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Post by rockjunquie on Apr 21, 2019 18:12:58 GMT -5
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Deleted
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Post by Deleted on Apr 21, 2019 18:19:29 GMT -5
@rocks2dust - I picked up a few more. These were listed as deschutes, which they don't look like to me. Are these blue deschutes? Or, are they the earlier Biggs you talked about in the other thread? Or, none of the above? Unfortunately, none of the above. Even low-quality Deschutes and Biggs do not have that texture. Those look more like African Queen "jasper" (from S. Africa, and not a jasper) or one of the other similar materials with similar patterns. |
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Post by rockjunquie on Apr 21, 2019 18:21:47 GMT -5
@rocks2dust - I picked up a few more. These were listed as deschutes, which they don't look like to me. Are these blue deschutes? Or, are they the earlier Biggs you talked about in the other thread? Or, none of the above? Unfortunately, none of the above. Even low-quality Deschutes and Biggs do not have that texture. Those look more like African Queen "jasper" (from S. Africa, and not a jasper) or one of the other similar materials. I noticed the texture/pits in the first one, but the others don't have it. To me they all look different. The last one especially. I didn't spend much, so I'm not worried about it. Just trying to learn.  |
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Deleted
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Post by Deleted on Apr 21, 2019 18:38:32 GMT -5
Unfortunately, none of the above. Even low-quality Deschutes and Biggs do not have that texture. Those look more like African Queen "jasper" (from S. Africa, and not a jasper) or one of the other similar materials. I didn't spend much, so I'm not worried about it. Just trying to learn. Was more referring to the grainy inclusions. In Biggs, and even moreso in Deschutes, the grains are finer. Some rhyolites that get sold as "Biggs" (like Disaster Peak) also feature the coarser grains. Still worth cabbing, especially as you didn't spend much and folks are still attracted to the hilly patterns. You'll see the difference when as you get toward polish, though. |
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Post by rockjunquie on Apr 21, 2019 18:49:17 GMT -5
I didn't spend much, so I'm not worried about it. Just trying to learn. Was more referring to the grainy inclusions. In Biggs, and even moreso in Deschutes, the grains are finer. Some rhyolites that get sold as "Biggs" (like Disaster Peak) also feature the coarser grains. Still worth cabbing, especially as you didn't spend much and folks are still attracted to the hilly patterns. You'll see the difference when as you get toward polish, though. Yeah, I was thinking I'll see when I cab it. Thanks! |
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QuailRiver
fully equipped rock polisher
Member since May 2008
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Post by QuailRiver on Apr 22, 2019 0:22:14 GMT -5
I believe what you have there is either Palomino or Disaster Peak picture jasper. Most African Queen I've seen tends to be more uniform in color tones and I've never seen any African Queen with blue/gray as in your third photo. Here are pictures of a couple of slabs of African Queen I have in my files.  I'll check and see if I have any scans of Palomino Picture Jasper Slabs and post them if I do. Larry C. |
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Deleted
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Post by Deleted on Apr 22, 2019 11:43:19 GMT -5
Neither African Queen Picture Rock or Disaster Peak area Picture Rocks are jaspers. IIRC, the former has some calcium content, while the latter is a rhyolite, so a drop of muriatic acid should differentiate. Lots of similar variation in Liesegang patterning in both, but color range is wider in the African Queen/Namib/Kalahari Picture stone.
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Post by rockjunquie on Apr 24, 2019 10:52:09 GMT -5
Got them in the mail today. The largest one has a surface like 400 grit sand paper. I tried to get a picture of the roughness. It actually has some glint from the texture. O could file my nails with this. I wonder how it will polish?  |
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Post by rockjunquie on Apr 24, 2019 10:53:37 GMT -5
Here are the 3 together- The small ones are much more smooth and tight grained, though no where near as tight as that Blue Biggs.  |
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Post by roy on Apr 24, 2019 10:54:13 GMT -5
this is a sandstone from utah
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Post by rockjunquie on Apr 24, 2019 10:59:47 GMT -5
And here is that Blue Biggs. You can easily see and feel the difference. The biggs has a very tight grain and slightly polished look with the saw. LOVE IT! I was worried about the thickness, but is a heavy 7mm. I only gave 5 a piece for those small ones and each will make at least 1 nice scenic cab. So, I don't feel bad. Even with combined shipping with the Biggs, I made out pretty good. Both pocs are dry. You can see how smooth the Biggs is.   Here is what my nice mailman brought today. One day, he just brought it all in a postal bin and left it on the porch! LOL! I've been on a slab roll. 6 Willow creek, some prime rhodo and picture stones.  |
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Post by rockjunquie on Apr 24, 2019 11:00:22 GMT -5
this is a sandstone from utah Thanks Roy! It sure feels like sandstone. Can I cab it? |
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Deleted
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Post by Deleted on Apr 24, 2019 12:25:37 GMT -5
Delicious photos of the Blue Biggs! Yes, just don't expect it to take much of a polish (and if sandstone, going to whatever is your finest sanding wheel is going to get it about as good as possible). I do see sandstone cabs and beads sold at shows, so matte finishes have their place. |
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Post by roy on Apr 25, 2019 10:32:33 GMT -5
this is a sandstone from utah Thanks Roy! It sure feels like sandstone. Can I cab it? im sure you could if you stabilize it first |
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