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Post by Mel on Nov 19, 2020 19:50:11 GMT -5
I usually use location to ID rocks but these were from a 1990's collector. I'm guessing the top two are jaspers, the big guy is chert, and no idea on the other two. What do you figure?
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Post by Peruano on Nov 20, 2020 7:35:25 GMT -5
Those would all be tough to id for me without being able to hold them, heft them, roll them in the light. The black one on the upper left is a tantalizing rock that "looks" like really dark wood. The little guy at the bottom says Jasper but then its speaking softly. Polish them up for us.
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Post by jasoninsd on Nov 20, 2020 8:02:33 GMT -5
Could that middle one on the right possible be Cherry Creek Jasper? I've seen a lot of reds in with Cherry Creek slabs, but I've seen them also with those two colors of tan and green...
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Post by Mel on Nov 20, 2020 11:22:35 GMT -5
Those would all be tough to id for me without being able to hold them, heft them, roll them in the light. The black one on the upper left is a tantalizing rock that "looks" like really dark wood. The little guy at the bottom says Jasper but then its speaking softly. Polish them up for us. Yeah, and my potato quality photo skills don't help! The one on the top left is actually a very dark green with spots that look are slightly translucent; I have some smaller pieces of it so I'll get a polished piece later today.
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Post by mohs on Nov 20, 2020 11:32:09 GMT -5
bottom left as a morrisonite type shade altho there is another type of jasper that as the same sort of cool ya got a great rock shop Mel where did all those rock slide from? m stly
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Post by Mel on Nov 20, 2020 12:51:55 GMT -5
bottom left as a morrisonite type shade altho there is another type of jasper that as the same sort of cool ya got a great rock shop Mel where did all those rock slide from? m stly I wish I knew mohs ! These came from a guy in Calgary You're bang on with the bottom left; pretty sure Morrisonite jasper. Now to do the others. ID'ing them is driving me nuts because I want to throw them in my shop. I have probably 5 pounds of the top two, and 10 pounds of the Morrisonite. The pink/green, and the garnet colored ones are "one of" slabs.
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Post by mohs on Nov 20, 2020 12:56:42 GMT -5
that pinkish yellowish on the right looks like material that hounded in Colorado at least i polished some similar a RTH member personally hounded
always hard to tell I suppose... keep on
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Post by Mel on Nov 20, 2020 13:09:32 GMT -5
Doing some more googling and I think the upper left might be BC jade/nephrite, and the upper right - red & green fancy jasper?
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Post by stephan on Nov 22, 2020 21:51:18 GMT -5
Doing some more googling and I think the upper left might be BC jade/nephrite, and the upper right - red & green fancy jasper? It might help to photograph them one at a time, and wet enough to hide the saw marks, to help us see them clearly. The UL initially looked like hawks eye, but when I enlarged, I saw that it was saw marks, not fibers. With that in mind, jade is possible, but so is green jasper. The rest appear to be jaspers of some sort.
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Post by Mel on Nov 22, 2020 22:00:44 GMT -5
stephan, I was hoping you would chime in. I will grab some wet pictures shortly. Do you have any suggestions for a good identification book or resource? Ed suggested the one may also be some type of morrisonite. Your thoughts?
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Post by stephan on Nov 22, 2020 22:39:06 GMT -5
stephan, I was hoping you would chime in. I will grab some wet pictures shortly. Do you have any suggestions for a good identification book or resource? Ed suggested the one may also be some type of morrisonite. Your thoughts? Sorry, but I learned hands-on at the club, more than from books, which makes pictures tough. As has been mentioned, there’s just a feel to certain rocks that you can know, but is difficult to describe. There are some ways to test, but most are destructive. One example is hitting it with a hammer. Jade is far less likely to break (nephrite is slightly less hard than jasper [easier to scratch], but far tougher [harder to fracture]). If you can fracture it, jasper has concoidal fracture; jade is usually splintery or sometimes granular). If it doesn’t break, jasper will ring like a bell, but so will a lot of the really hard jaspers (like a lot of the ones out of Oregon). Non-destructively, there is a subtle difference in feel. Jade will feel more soapy than jasper. With those saw marks, though, it will be tough. You’ll have to use the edge — the face will feel like corduroy for both. I’m not an expert on Morrisonite, but I don’t think that’s what you have. Colors look similar, but I’m no seeing any orbs, and far more fractures. I’d be more inclined to side with jasoninsd, and say cherry creek.
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Post by Mel on Nov 22, 2020 22:41:03 GMT -5
Interesting. I agree, no substitute for hands on; our only rock club has been closed for the year since Covid, and unfortunately the only real expert I can think of locally......well, he's not my cup of tea. Threw some quick pictures up in an album here. Such a mystery. I wonder if the green is not nephrite, if it could be some variation of moss or tree agate.
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Post by stephan on Nov 22, 2020 22:42:39 GMT -5
Interesting. I agree, no substitute for hands on; our only rock club has been closed for the year since Covid, and unfortunately the only real expert I can think of locally......well, he's not my cup of tea. That too bad. Nothing like people that make you uncomfortable. 😬
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Post by stephan on Nov 22, 2020 22:46:01 GMT -5
One more thing to try... when polishing, jade swarf will be soapy and white. Jasper will often be dirty, and the color of the stone, but not “foamy.” If you have a cabbing machine, give it a quick test on the 280 soft.
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Post by Mel on Nov 22, 2020 22:47:18 GMT -5
Interesting. I agree, no substitute for hands on; our only rock club has been closed for the year since Covid, and unfortunately the only real expert I can think of locally......well, he's not my cup of tea. That too bad. Nothing like people that make you uncomfortable. 😬 Yeah, the guy has a really well rounded knowledge base (he's 82 and had been doing rocks since 1955), but our conversation left me feeling like he was actively trying to discourage me from anything. Also disheartening since was hoping it could be sort of a mentorship kind of situation for the things I simply can't learn from books. Such is life. Album Link for random slabs with no ID. Took a couple wet and dry and some other randoms I'm still on the fence about; the green one does not photograph well wet at all. I do have a 220 belt on my Lortone unit, will give it a shot tomorrow.
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Post by stephan on Nov 23, 2020 0:41:16 GMT -5
Well, at least you have RTHlings. 😁
Looking at those other pics, I’m confused. Pic 1 looks more jasper-like, since the veins appear to be quartz (which is rare with jade). Also, the patterns look almost landscapy. Pic #2 looks more jade like. If forced to guess, I’d say jasper with intrusions. I have some kinradite, which has a similar appearance to the jasper with quartz, epidote and hematite (plus red orbs portions, but not everywhere).
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Post by Mel on Nov 23, 2020 13:07:12 GMT -5
Yeah, it's really weird stuff. I have some slabs I know are nephrite, and these ones are some kind of.....mutt. Maybe green jasper with quartz?
I love this forum so much, I'm sad I lurked for so long. Everyone is always super friendly and helpful, it's amazing.
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kyoti
has rocks in the head
Member since June 2020
Posts: 542
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Post by kyoti on Nov 25, 2020 19:35:42 GMT -5
The lower right looks like the maroon chert/ jasper I find around North Texas.
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