sticksinstones
starting to spend too much on rocks
Member since February 2012
Posts: 117
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Post by sticksinstones on Feb 21, 2012 12:44:06 GMT -5
This stuff seems to form like a lot of the picture jaspers here in Oregon and whole nodules often take on this polyhedroid like shape. It's not as easy to polish as the porcelain jaspers, but it can still be coached to a magnificent shine.
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Post by parfive on Feb 21, 2012 14:19:04 GMT -5
Silicified mudstone - not really a jasper, and not nodular. I’d call it a chunk. [Edit] I know it is a jasper, Steve - just on the muddier end of the scale compared to others.
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Post by FrogAndBearCreations on Feb 21, 2012 14:50:29 GMT -5
Thats really pretty noreena!
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Post by stonesthatrock on Feb 21, 2012 14:57:50 GMT -5
is this the same, sticksnstones that was mentioned on the other topic?
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Post by Donnie's Rocky Treasures on Feb 21, 2012 16:43:59 GMT -5
Geeze, that's gorgeous!
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Post by helens on Feb 21, 2012 17:05:01 GMT -5
Whoa... that's incredible color!!
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Post by kk on Feb 21, 2012 17:07:39 GMT -5
Yeah, has its setbacks, but the color intensity is fabulous.
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sticksinstones
starting to spend too much on rocks
Member since February 2012
Posts: 117
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Post by sticksinstones on Feb 21, 2012 17:29:56 GMT -5
Silicified mudstone - not really a jasper, and not nodular. I’d call it a chunk. [Edit] I know it is a jasper, Steve - just on the muddier end of the scale compared to others. A lot of jaspsers that began as mud (including local stuff like Biggs or Rocky Butte jasper or something that I have a lot of that looks a lot like Noreena but was called "antelope" jasper by the lady I bought it from) will form into full pattern "nodules". I doubt there's a very scientifically accepted strict definition for the term and though I know it's used more often with rounded shapes, I didn't think it precluded angular forms (I'm always open to being educated). Many of the picture jaspers, in suitably large pieces, have natural seems and fissures where the pattern forms a distinct rind with the color variation on the inside. Although the stone may well have formed in a layer, the naturally occurring, flat angular faces between individual chunks with natural seems will form recognizable complete pieces with a rind that covers the entire stone and the pattern is completely contained inside that rind with color bands following it. The faces along these natural lines are typically smooth and flat and often have a softer minerals along them (you can see it as the black on top of the first Noreena photo) and I've always assumed went through a process not unlike dried, cracked mud on a desert prairie somewhere. In any event, by looking for whole rough "nodules" (vs. broken chunks) with these natural faces on the outside, you create for yourself the opportunity of cutting a full pattern specimen that is naturally framed both in the polished face and on the outside husk of the stone. And yes, it is a tad less silicified than the porcelain jaspers here in the NW, but I assume it was formed in a similar process. Here's another example of a full pattern piece completely framed with a natural rind from Rocky Butte (a little over a foot wide): You can see that this jasper exhibits the same naturally occurring flat angular lines with an internal color pattern that conforms to this husk. When I market these stones I use the term nodule to describe them as being distinct from the more often seen random broken chunks that were extracted in a hard rock mining operation. My tastes and interests were drawn to finding and finishing these sorts of full pattern examples of the natural stones because I found them more interesting and offering up a more complete version of their story than the (still lovely) smaller chunks. But like I said, if there's a more descriptively accurate term anyone can suggest I'm pretty open minded about that sort of thing and welcome the suggestions.
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shermlock
has rocks in the head
Member since August 2011
Posts: 612
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Post by shermlock on Feb 21, 2012 17:32:13 GMT -5
Sticks: I really like seeing your work and learning from your experience! Awesome pieces! Scott
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herchenx
Cave Dweller
Member since January 2012
Posts: 3,360
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Post by herchenx on Feb 21, 2012 18:31:26 GMT -5
Really cool specimens. I love Noreena, and if that orangey stuff is antelope I love Antelope now too. Thanks for sharing, I love seeing these bigger specimens. I usually get to see only saw scrap in person, and even it is beautiful.
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Post by susand24224 on Feb 21, 2012 20:17:27 GMT -5
Incredible piece of Noreena--the nicest I've seen. Thanks for taking the time to post the photos.
Susan
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Post by parfive on Feb 22, 2012 0:26:19 GMT -5
I get your drift, Steve, on describing discrete/distinct pieces of jasper.
With agates typically classified as either nodular or seam type, that’s my agatehead perspective on the jaspers. So I’ve got stuff like RSJ, Imperial, thunderegg types in the nodular camp. Can’t think of a good name yet for the chunks, though.
(Almost like a fractal the way Noreena breaks down with the internal fractures.)
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Post by Woodyrock on Feb 22, 2012 0:39:49 GMT -5
If, I had to, I would more than coax a polish out of this pieces, beat it into submission I would. Woody
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sticksinstones
starting to spend too much on rocks
Member since February 2012
Posts: 117
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Post by sticksinstones on Feb 22, 2012 0:55:13 GMT -5
I get your drift, Steve, on describing discrete/distinct pieces of jasper. With agates typically classified as either nodular or seam type, that’s my agatehead perspective on the jaspers. So I’ve got stuff like RSJ, Imperial, thunderegg types in the nodular camp. Can’t think of a good name yet for the chunks, though. (Almost like a fractal the way Noreena breaks down with the internal fractures.) It's a lot like a polyhedroid agate. Most people think of them as discrete specimens, but you can sometimes find very large ones that are composed of multiple tightly bound pieces that form a larger one sort of like what you are seeing in the jasper. I have a large multi-fractal polyhedroid on my fireplace mantle and I know from experience that some of those interlocked parts wanted to come apart. So is a polyhedroid agate an agate nodule or ?? I'd feel like I'd lost my mind if I started calling these jasper polyhedroids but it might be more technically correct
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chromenut
fully equipped rock polisher
Member since December 2009
Posts: 1,971
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Post by chromenut on Feb 22, 2012 0:57:23 GMT -5
very very nice specimens!
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Post by Bikerrandy on Feb 24, 2012 20:11:37 GMT -5
The Noreena is beautiful!!
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geostew
starting to shine!
Member since September 2011
Posts: 42
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Post by geostew on Feb 24, 2012 22:41:42 GMT -5
That is incredible Noreena, it even appears to have a little flame action.
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