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Post by Son Of Beach on Oct 19, 2021 17:23:07 GMT -5
These were all found at a little greenhouse/rock shop/resale thrift shop near Frankfort, MI. Very neat place if you're ever in the area. Crystal Gardens
Some (picture?) and leopard jasper, prairie agates which I had never heard of before, a handful of randos from the dollar bin, a chunk of Kona Dolomite, and what I think is basalt and peridot. I left a bigger shot if anyone wants to chance an ID on that guy. I had to pry myself away a dozen times, but I felt like for 20 bucks I definitely got my moneys worth.   
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Post by mohs on Oct 19, 2021 17:43:48 GMT -5
good stuff!
that green could be peridot
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Post by jasoninsd on Oct 19, 2021 21:00:23 GMT -5
That was $20 VERY well spent!  By the way...we have Prairie Agates GALORE out here in South Dakota.  |
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Post by Son Of Beach on Oct 19, 2021 21:21:25 GMT -5
That was $20 VERY well spent! By the way...we have Prairie Agates GALORE out here in South Dakota. I'd move in a heartbeat if you had a couple great lakes  Pretty much the only thing that anchors me to this area |
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Post by jasoninsd on Oct 19, 2021 21:22:58 GMT -5
That was $20 VERY well spent! By the way...we have Prairie Agates GALORE out here in South Dakota. I'd move in a heartbeat if you had a couple great lakes Pretty much the only thing that anchors me to this area We don't have any great lakes...just a couple mediocre ones!  |
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Post by Son Of Beach on Oct 19, 2021 21:49:50 GMT -5
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Post by fernwood on Oct 20, 2021 5:13:32 GMT -5
Nice finds. I was say basalt with peridot for the maroon/green one.
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Post by MsAli on Oct 20, 2021 7:47:32 GMT -5
The green/black one is olivine
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Post by rockjunquie on Oct 20, 2021 7:49:05 GMT -5
Nice picks!
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Post by Son Of Beach on Oct 20, 2021 8:16:58 GMT -5
The green/black one is olivine Ohhhh interesting. If its the same I find on the beach, it should polish nicely. I don't know that I have big specimen to show off yet. Ok so..."Olivine is also the mineral of the gemstone known as "peridot." So I was on the right path. If I had to guess, I'm finding more peridot than olivine at the lake because the greens really pop....this will be fun to tumble and see the difference. Olivine |
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rads
spending too much on rocks
Making clay each day!
Member since April 2018
Posts: 319
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Post by rads on Oct 20, 2021 8:40:42 GMT -5
Nice score and you got to drive down M-22 in the fall. One of the nations most beautiful roads. Next time you are up that way, the C&M Rock Shop is in Honor. Worth the drive, have spent hours in the "rough" yard out back of the shop.
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Post by Son Of Beach on Oct 20, 2021 9:24:01 GMT -5
Nice score and you got to drive down M-22 in the fall. One of the nations most beautiful roads. Next time you are up that way, the C&M Rock Shop is in Honor. Worth the drive, have spent hours in the "rough" yard out back of the shop. Yea that's exactly where we went! The colors just weren't there yet, still one of my favorite drives. Thank you for the tip on that shop, I'll make sure to check it out next time. |
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Post by MsAli on Oct 20, 2021 15:06:22 GMT -5
The green/black one is olivine Ohhhh interesting. If its the same I find on the beach, it should polish nicely. I don't know that I have big specimen to show off yet. Ok so..."Olivine is also the mineral of the gemstone known as "peridot." So I was on the right path. If I had to guess, I'm finding more peridot than olivine at the lake because the greens really pop....this will be fun to tumble and see the difference. OlivineI have a 5 gal bucket full I picked up at an auction. Haven't done much with it other than sell a few for specimens. It will be interesting to see how it tumbles |
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Post by Son Of Beach on Oct 26, 2021 18:36:29 GMT -5
Just found this lil bugger, I'm pretty excited to see what it turns into. I think some of the deeper cracks may have to stay.... And a cool little septarian    |
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Post by Son Of Beach on Jun 21, 2022 15:26:12 GMT -5
So I finally got a chance to put this guy in for a few weeks, think we had guessed basalt and peridot of some sort  It's very soft and likely not to finish well. However, there were some little gems inside that are as interesting in my opinion.
Some quartz or at least something quartzlike that was hidden
On occasion I find some stones with this deeper shade of green and purples together. Now I know where they come from  It's all roughly the same hardness which helps explain when I find the soft quartz in other rocks I know they won't tumble well
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Post by mohs on Jun 21, 2022 17:37:00 GMT -5
That basalt peridot came from deep in the earth
Rare find?
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Post by Son Of Beach on Jun 21, 2022 18:05:36 GMT -5
That basalt peridot came from deep in the earth Rare find? If I've been paying attention, harder rocks would tend to be further buried, more pressure, more heat, more forces to compress the uhh, rock. I guess the one I showed is more Olivine than Peridot
This was a rock shop purchase not one found on the lakeshore, so I'm guessing maybe more surface level material or something not buried as "deep", whatever depth that means. I do find rocks more stable than this on nearly every trip. I don't know if it's exactly the same composition, but there are certainly similarities and they hold up much better in the ole tumbler. I call them "Betty Green Eyes". With zero knowledge other than observations to back me up, this is close to the same makeup with some variation. 
This covers some....
"Most olivine found at Earth's surface is in dark-colored igneous rocks. It usually crystallizes in the presence of plagioclase and pyroxene to form gabbro or basalt. These types of rocks are most common at divergent plate boundaries and at hot spots within the centers of tectonic plates.
Olivine has a very high crystallization temperature compared to other minerals. That makes it one of the first minerals to crystallize from a magma. During the slow cooling of a magma, crystals of olivine may form and then settle to the bottom of the magma chamber because of their relatively high density. This concentrated accumulation of olivine can result in the formation of olivine-rich rocks such as dunite in the lower parts of a magma chamber."
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Deleted
Deleted Member
Member since January 1970
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Post by Deleted on Jun 23, 2022 9:22:15 GMT -5
Son Of BeachThose are nice Chad! I really like that random spot of purple in the one.
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Pretty much the only thing that anchors me to this area
