zebra61
starting to spend too much on rocks
Member since January 2024
Posts: 116
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Post by zebra61 on Jan 21, 2024 11:46:25 GMT -5
This thing is Orange/Red and has a specific gravity of 2.88. I can't make a scratch on it and I'll have to do some research about #2,#5 and #6. I'm not allowed to be around flames unsupervised so this is the best I can do. This thing was found in the middle of North Dakota in a shallow gravel pit. My Nephew-In-Law is a geologist and took one look at it and said 'Granite' but I have my doubts as we don't see much granite in ND. (plus I want to prove him wrong in the worst way!) I've looked at lots of Jasper and that's my 'don't have no masters degree in geology' guess. Can you give me your best guess? I'm so darn curious. Thanks! Mark
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Post by rockjunquie on Jan 21, 2024 12:07:18 GMT -5
It doesn't say granite to me. I'd guess jasper. But, you can take that with a grain of salt. Sorry.
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Post by jasoninsd on Jan 21, 2024 19:41:12 GMT -5
It doesn't say granite to me. I'd guess jasper. But, you can take that with a grain of salt. Sorry. I'm just south of you here in South Dakota...and everything I find that looks like that, I've classified as Jasper. Looks like Jasper...sounds like Jasper...tastes like Jasper!
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Post by realrockhound on Jan 21, 2024 20:06:20 GMT -5
Jasper
Source: self proclaimed professional rockhound. Undisputed king of plume 😂
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zebra61
starting to spend too much on rocks
Member since January 2024
Posts: 116
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Post by zebra61 on Jan 21, 2024 21:00:56 GMT -5
Thanks everyone... I'm going with Jasper too. I appreciate the help.
Mark
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zebra61
starting to spend too much on rocks
Member since January 2024
Posts: 116
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Post by zebra61 on Jan 21, 2024 21:06:08 GMT -5
It doesn't say granite to me. I'd guess jasper. But, you can take that with a grain of salt. Sorry. I'm just south of you here in South Dakota...and everything I find that looks like that, I've classified as Jasper. Looks like Jasper...sounds like Jasper...tastes like Jasper! Just so that I'm prepared jasoninsd, what do Jaspers taste like?
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Post by jasoninsd on Jan 21, 2024 21:09:35 GMT -5
I'm just south of you here in South Dakota...and everything I find that looks like that, I've classified as Jasper. Looks like Jasper...sounds like Jasper...tastes like Jasper! Just so that I'm prepared jasoninsd, what do Jaspers taste like? Depends where I find them out here. If it's down by the river, they're not so bad. If they're out in the cow pasture, they taste like...well...you know!
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ThomasT
spending too much on rocks
Trying to keep the dust down.
Member since June 2022
Posts: 258
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Post by ThomasT on Jan 21, 2024 21:46:10 GMT -5
zebra61 From what I can see of the fracture angles I'd guess it's Feldspar with bits of Hornblende... the geologist is perhaps correct.
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Post by rmf on Jan 24, 2024 22:35:32 GMT -5
zebra61 From what I can see of the fracture angles I'd guess it's Feldspar with bits of Hornblende... the geologist is perhaps correct. ThomasT is correct I think. The fracture is not conchoidal in any way which I would expect from jasper though not 100%. looks like ND rocks are 99.9% sedimentary except for lowest rocks in the Geologic column where there are igneous & metamorphic. This is where we can guess but a picture is not going to give enough info to be sure. Try hardness test if you have any agate or quartz will they scratch your rock If so the rock is Feldspar.
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zebra61
starting to spend too much on rocks
Member since January 2024
Posts: 116
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Post by zebra61 on Jan 26, 2024 17:04:51 GMT -5
zebra61 From what I can see of the fracture angles I'd guess it's Feldspar with bits of Hornblende... the geologist is perhaps correct. ThomasT is correct I think. The fracture is not conchoidal in any way which I would expect from jasper though not 100%. looks like ND rocks are 99.9% sedimentary except for lowest rocks in the Geologic column where there are igneous & metamorphic. This is where we can guess but a picture is not going to give enough info to be sure. Try hardness test if you have any agate or quartz will they scratch your rock If so the rock is Feldspar. I'll do that over the weekend and see what happens. I have a little crushed agate laying around that I can use. Just so you know, my old used (and probably very dull) dental pick wouldn't scratch it at all. Thanks!
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Post by tandl on Jan 29, 2024 11:57:48 GMT -5
zebra61 From what I can see of the fracture angles I'd guess it's Feldspar with bits of Hornblende... the geologist is perhaps correct. I agree
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