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Post by kk on Oct 22, 2011 9:38:05 GMT -5
I had always been under the impression that Biggs is not translucent, yet today I found this slab again and realized that there are translucent parts in this slab. I know that I bought it as a Biggs. Any idea, if this is really Biggs? Thanks for looking and any advice you can give.
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Post by jakesrocks on Oct 22, 2011 9:47:05 GMT -5
It could very well be Biggs. It appears that at some time the top portion was crushed by ground movement, and re-cemented with translucent agate. Interesting patterns in that piece. The top, breciated portion should cut an interesting cab or two, and I see several possibilities for the bottom.
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Post by kk on Oct 22, 2011 10:01:39 GMT -5
Will cut the market portion of the top tomorrow. Its certainly the most diverse Biggs I have ever seen when it comes to color. The lower section is criss-crossed by a few fractures but yes there should be a few possibilities. As the slab is quite thick, I play with the idea of finding a picture that allows me to do a little carving on it (a carved cab combo).
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Fossilman
Cave Dweller
Member since January 2009
Posts: 20,687
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Post by Fossilman on Oct 22, 2011 10:39:07 GMT -5
Looks like it...............
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rockhound97058
freely admits to licking rocks
Thundereggs - Oregons Official State Rock!
Member since January 2006
Posts: 760
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Post by rockhound97058 on Oct 22, 2011 10:50:42 GMT -5
Yeah thats Biggs - Looks like Fulton Canyon Material - or maybe even found as float near the town of Rufus. There's a few mines which produce material which has that brecciated material... Most commonly you see it as a common opal left over product.
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Post by kk on Oct 22, 2011 11:01:22 GMT -5
Most commonly you see it as a common opal left over product. So the translucent parts would be common opal, like the one you see in some Willow Creek close to the rind? Is there a different classification for this kind of brecciated material? Thanks for the info, Kurt
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Post by kk on Oct 22, 2011 20:55:01 GMT -5
Any suggestion in regards to different classification for the brecciated part of the material?
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rockhound97058
freely admits to licking rocks
Thundereggs - Oregons Official State Rock!
Member since January 2006
Posts: 760
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Post by rockhound97058 on Oct 22, 2011 22:18:35 GMT -5
I shouldn't have said most is common opal. We see a combination of agate mixed in as well - Sorry about that... earlier I was thinking of my buddies property (China Hollow Ranch) which has one pit we find alot of opalized brecciated material. This material as well as the Biggs, Deschutes & More is formed in between basalt flows so it's been exposed to alot of pressure and movement.
You never know what to expect with this material - I personally have found a fossil fish print in a piece of Biggs - One mine owner has several fish and a great metaseqoia fossil as well.
In my home town of The Dalles I used to dig a material which looked like large opal nodules/pieces, however when you broke the opal away it had a large agate center. Really neat material.
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Post by kk on Oct 23, 2011 0:20:13 GMT -5
Yeahh, just cut it and the material is all over the place.
Got a lot of mud (blood red) in there, yet you might not have been wrong about the opal. Some places splintered and the breaking-surface resemble opal much more than the grainy surface of agate.
Will show the finished cab by tomorrow with some others that I'm playing with.
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Post by Rockoonz on Oct 23, 2011 2:16:33 GMT -5
Theres some brecciated stuff i found across the Columbia in WA state where they built the wind farms. It can be Agate, jasper, opal and combinations. A bit challenging to cut.
Lee
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