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Post by pghram on Feb 5, 2014 15:16:50 GMT -5
Friends, Here are a few more that I finished recently. Bruneau Jasper Cab The 8th and last Denrditic Agate cab (collective sign of relief form everyone) What I believe to be Palm Root What I believe to be Rhyolite Rocky Butte Picture Jasper. I have re-done it once to try & even the angle at the tob, but it still looks off in the photo. It looks better in hand, but it is still off. Thanks for looking, Rich
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Post by Drummond Island Rocks on Feb 5, 2014 15:28:40 GMT -5
great set of cabs. I like the Bruneau and rocky butte the best. I'll keep checking back to see if you get an accurate I.D. on the one you say is rhyolite. I picked up a few slabs of something that looks just like it and I did cab it. It was soft. here's the slabs that I am talking about. chuck
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Post by pghram on Feb 5, 2014 15:33:19 GMT -5
Chuck, thanks, the one that I think is Rhyolite is fairly hard, but not agate hard.
Rich
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Post by Drummond Island Rocks on Feb 5, 2014 16:04:55 GMT -5
I never did any scratch testing (guess I should) but like you said it was not anywhere near agate hard but the shine was way better then a rhyolite when it was done. My cab was posted here. could be different material then yours but looks similar. forum.rocktumblinghobby.com/thread/63995/1-26-weekend-wrapsChuck
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jamesp
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Post by jamesp on Feb 5, 2014 16:30:31 GMT -5
It could be Tela Formosa petrified fern. It does resemble fern. It my favorite petrification. I like the how the bottom line of the first cab follows the bands. clever A different type. Some fern occurs in south Texas. Mel may know. This one looks closest. Google called it osmunda fern
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Sabre52
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Post by Sabre52 on Feb 5, 2014 18:35:40 GMT -5
That one looks like palm root to me too. The banded stuff that resembles rhyolite may be a type of dolomite/travertine similar to Oaxaca travertine/Guadalupe Picture rock ( goes under several trade names). It can have similar bands, colors, and is a softer material than rhyolite. Years ago, a similar dolomite stone came out of China called Gobi Stone but now the name "Gobi Stone" is used for another material...Mel
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jamesp
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Post by jamesp on Feb 5, 2014 19:18:56 GMT -5
That one looks like palm root to me too. The banded stuff that resembles rhyolite may be a type of dolomite/travertine similar to Oaxaca travertine/Guadalupe Picture rock ( goes under several trade names). It can have similar bands, colors, and is a softer material than rhyolite. Years ago, a similar dolomite stone came out of China called Gobi Stone but now the name "Gobi Stone" is used for another material...Mel I am curious why that is palm Mel. What identifying part separates it from fern. Just trying to know how to tell them apart.
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Sabre52
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Post by Sabre52 on Feb 6, 2014 9:30:39 GMT -5
James, Admittedly, some fern examples and some palm root examples look similar enough I could not tell them apart. Based on the examples I have in my collection, I'd have to say fern examples look more "organized" than palm and the centers of the roots (pith) seem "off center" If you look at the root mass of a living palm, it's basically a big tangle of roots and the roots have a circular area of pith basically located in the "center" of the root. When you cut a fossil palm root specimen, you still have that disorganized look with big roots, smaller roots, ones cut slightly at an angle etc. All the fern specimens I have are more organized and those big vascular bundles seem to be more regularly "C" or "V" shaped.
That being said, the only fern "roots" I have are from Texas and the root cross sections are much smaller than palm too. I suspect that fern "root" from those big Psaronis type tree ferns might be really tough to tell from palm as some examples Ted sent me sure would look like California palm root, if I did not know different. After all both are monocots and so their roots would naturally have a lot of similar characteristics. Basically, I guess I'd have to say I go on looks and the cab has the "look" of palm root to me....Mel
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Post by pghram on Feb 6, 2014 10:45:39 GMT -5
Chuck, Your material & cab is much nicer. It has richer colors than mine, but they may be related.
James, thanks for the input, I couldn't tell a root from a fern (once it's a rock, anyhow). Those are some beautiful examples that you posted.
Mel, thanks for the confirmation. It's not the most colorful cab but it took a great shine & has an interesting pattern. The only reason that I bought the slab was because I suspected it was Palm Root from some of your other posts.It's much nicer in-hand.
I don't think the stripped one is dolomite/travertine, I have cabbed kona & another travertine before & this is much harder than those. I think it's just a lower grade Rhyolite, well silicified & nice pattern, but the colors are soft.
The names of most of this stuff is pure marketing & therfore confusing & often misleading.
Rich
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jollyrockhound
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Post by jollyrockhound on Feb 6, 2014 12:00:12 GMT -5
Those are some very shiny and pretty cabs love they way you did those.
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Post by rockjunquie on Feb 6, 2014 12:54:28 GMT -5
Great cabs!!! Your shines are quite impressive. Are you just using diamond wheels?
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jamesp
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Post by jamesp on Feb 6, 2014 13:11:32 GMT -5
James, Admittedly, some fern examples and some palm root examples look similar enough I could not tell them apart. Based on the examples I have in my collection, I'd have to say fern examples look more "organized" than palm and the centers of the roots (pith) seem "off center" If you look at the root mass of a living palm, it's basically a big tangle of roots and the roots have a circular area of pith basically located in the "center" of the root. When you cut a fossil palm root specimen, you still have that disorganized look with big roots, smaller roots, ones cut slightly at an angle etc. All the fern specimens I have are more organized and those big vascular bundles seem to be more regularly "C" or "V" shaped. That being said, the only fern "roots" I have are from Texas and the root cross sections are much smaller than palm too. I suspect that fern "root" from those big Psaronis type tree ferns might be really tough to tell from palm as some examples Ted sent me sure would look like California palm root, if I did not know different. After all both are monocots and so their roots would naturally have a lot of similar characteristics. Basically, I guess I'd have to say I go on looks and the cab has the "look" of palm root to me....Mel Thanks for clarifying that Mel. I see what you are saying about the 'c' and the 'v'. Especially that point. The(live)sable palms have round roots but the palm bog from California has more odd and random cross sections. I looked up palm bog and palm root and see how they are not round. Was amazed at the beauty of California palm root. Thanks
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aimeesrockworks
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Post by aimeesrockworks on Feb 6, 2014 13:16:27 GMT -5
I'll keep looking at any old dendrite you want to make and post... can't get enough!!
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Sabre52
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Post by Sabre52 on Feb 6, 2014 13:42:06 GMT -5
James, The Calif. palm root is pretty interesting. In some areas the root ball is totally intact and in those examples the roots are usually pretty rounded. This is often true in the Edison palm root. In other places like some of the desert collecting areas, the root balls were obviously subjected to a lot of pressure from volcanic ash or sediments and the exterior shapes of the roots are often very distorted or smashed into odd shapes and twisted orientations.....Mel
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jamesp
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Post by jamesp on Feb 6, 2014 17:13:24 GMT -5
James, The Calif. palm root is pretty interesting. In some areas the root ball is totally intact and in those examples the roots are usually pretty rounded. This is often true in the Edison palm root. In other places like some of the desert collecting areas, the root balls were obviously subjected to a lot of pressure from volcanic ash or sediments and the exterior shapes of the roots are often very distorted or smashed into odd shapes and twisted orientations.....Mel I see. The palm is one of my favorites, fern is. I was impressed with the palm out there. Interesting that external forces altered them. Makes them even more interesting. Way more, it is cool to see fossilized damage from parasites, lava flows, glacier effects and so on. Finding coral and oysters with clam or sponge damage is cool too. More coral has clam bore holes than not. I saw Jean's and maybe your palm bog in past posts. It was eye catching and seemed to have other items petrified w/it.
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Post by pghram on Feb 6, 2014 17:29:28 GMT -5
Thanks all.
rockjunquie, not quite. I rough out the preform on an 8 inch 80 grit diamond wheel, do the initial sanding on an expando at 220 sic, then go to diamond flex disks on my flat lap starting at 220 (yes, I do 220 sic & diamond), 325, 600, 1200, 3K, 8K (only the softer stuff like the Rhyolite) & finish w/ 14K usually. The Rhyolite I took to 50K. Sometimes, rarely, if I'm still not happy I go to Tin Ox on hard felt. The physics would seem to say it should not help, or even get worse, but on a few the Tin Ox really brings up the best polish. This may have bee more than you wanted to know :>)
Rich
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adrian65
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Post by adrian65 on Feb 6, 2014 23:39:00 GMT -5
Superb set of cabs, Rich!
Adrian
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Post by pauls on Feb 7, 2014 1:28:12 GMT -5
If the "Rhyolite" is a bought stone it could very easily be Australian. Marble Bar in Australia has a very pretty striped Jasper that looks exactly like that. The Town of Marble Bar in Western Australia has a rocky bar across the river composed of gorgeous striped Jasper, The bar itself is a national park or reserve so no collecting is allowed, Luckily the hills all around are made of the same stuff. The following link has a few pictures. www.ournakedaustralia.com.au/experience-marble-bar/
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Tommy
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Post by Tommy on Feb 7, 2014 10:18:38 GMT -5
They're all beautiful but that bruneau is world class Rich on both design and shine!
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Post by pghram on Feb 7, 2014 11:51:17 GMT -5
Pauls, yes it was bought & it does look very similar. Thanks, I had never heard of Marble Bar Australia or the jasper. They are both increadibly beautiful.
Tommy & Adrian, thanks for the comments, I am humbled.
Rich
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