Lapidaryforum.net
Let's Rock => Identifications of Materials => Topic started by: iamrockaholic on October 02, 2018, 10:51:14 PM
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This rock came from Franklin show last May labeled Yellow Skin Jasper. I have been unable to find anything resembling this. Its heavy, solid, not vuggy and its minty green with blue/gray striations. I have taken several pictures and can't seem to get the mint green color correct to match the slab. Help please and thanks.
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I definitely do not know what it is for sure. Looking at a close up of the bottom right edge the material looks more "sugary" than a Jasper and to me looks more like a grainy material like an aventurine like material. When you said Franklin is that the New Jersey Franklin? So many different types of minerals back there. So many people here, someone will recognize it for sure
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Actually it was Franklin, NC last May. We go to the William Holland School of Lapidary and stay for the GLW and local rock shows. Our problem is that he buys for quality and content and I buy cause its pretty. But, my hubby is a really smart man, he may not be able to identify what I bring home, but he will slab it and cab it, cause he knows, if momma ain't happy .......
All kidding aside, he slabbed it, but he won't cab it until he knows what it is, and in trying to prove a point to me he's making me identify it. I've been through all my Patty Polk books and the internet to no avail. I almost feel like it was dyed that color but can you dye an entire rock?
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It does not look dyed at all to me. Nothing wrong with buying pretty for sure. If it doesn't interest you better to leave it anyway. There are plenty of "popular" materials that I don't have any desire for. And your husband has it right Happy Wife Happy Life.
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What's the hardness on it? Looks like white material on the edges - what does the rind look like? If you have any other photos showing how the pattern might (or might not) change that could also be helpful.
Some features of your rough remind me of something we've had here, but can't say from the pics so far.
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Thanks Vince. I'll see if I can get a better picture tomorrow. Its heavy and solid with hardness probably around 4. It kinda reminds me of Ballarat Onyx where most of the fracture lines are in the grey strata. Couldn't find it under onyx either. Thanks all!
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magnesite.
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I'd say Magnesite would be the most likely suspect if that's what Mr. Lithic says. Especially if the overall color of the lighter parts in your photo is mint green.
If the overall color was off-white with green areas I was beginning to wonder if it was a piece of Picasso Marble without the characteristic random lines. We have a slab or two here with larger "clear" off-white areas adjacent to the green. It doesn't look exactly like yours, but close enough to make me wonder.
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In Washington state there is huge amounts of magnesite but interestingly I suspect that the Franklin marbles which are the country rock for the Franklin and Ogdensburg mines right where you bought the rock contain magnesite along with the huge variety of minerals in the ore body.I used to live there and my Dad mined in the area and lots of specimens changed hands .
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Thanks everyone for your help and input! I took 2 photos of the rind to see if that can help. Otherwise its going up as Mystery Rock which I hate to do.
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Hi, it's probably Marble.
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It looks like a green jasper that I got a piece of one time. It came from Utah if I remember correctly
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The two things I really notice are; Hardness is 4 and the green area where the rock is flaking off. These are two great clues that I have no answer for. good luck.