patrock
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Post by patrock on Aug 15, 2015 17:30:18 GMT -5
I found it in Eastern Missouri in a creek about 15 miles from the Mississippi river. i crudely sawed it in half. It is in a vibratory tumbler at this point with aluminum oxide 500.
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spiritstone
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Post by spiritstone on Aug 16, 2015 7:32:32 GMT -5
Cinnamon buns?
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jessiegumdrop
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Post by jessiegumdrop on Aug 16, 2015 12:30:02 GMT -5
I found it in Eastern Missouri in a creek about 15 miles from the Mississippi river. i crudely sawed it in half. It is in a vibratory tumbler at this point with aluminum oxide 500. Not sure if this is right but check it out i.imgur.com/OK4yEIB.jpgAlso Google eldonia
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Deleted
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Post by Deleted on Aug 16, 2015 15:29:02 GMT -5
If it's sandstone you better check your tumbler pretty quick, otherwise you gonna have eldonia slurry.
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patrock
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Post by patrock on Aug 16, 2015 15:44:06 GMT -5
Not sandstone. I think you are seeing my saw marks. I used a concrete saw to cut it. The very center appears to be porous but the whole thing is very hard. 7-8 Mohs. I did check the slurry a bit ago and it is polishing up VERY NICELY! I will post the finished product at the end of the week when it is finished. It is in with a about 7 pounds of mozarkite I collected with my kids and brother-in-law.
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patrock
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Post by patrock on Aug 16, 2015 15:49:50 GMT -5
I found it in Eastern Missouri in a creek about 15 miles from the Mississippi river. i crudely sawed it in half. It is in a vibratory tumbler at this point with aluminum oxide 500. You know, I was not thinking fossil. I did think it could be petrified wood. The flip side is pretty 3d almost like petrified wood. Hmm. I will check that out. Thanks. Not sure if this is right but check it out i.imgur.com/OK4yEIB.jpgAlso Google eldonia
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patrock
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Post by patrock on Aug 17, 2015 16:23:58 GMT -5
You're right! Paleozoic-cinnamon buns.
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boutoo
having dreams about rocks
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Post by boutoo on Aug 17, 2015 18:01:02 GMT -5
Looks like Tigers eye to me...the colour & stripes are right for it anyhoo
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patrock
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Post by patrock on Aug 17, 2015 20:01:30 GMT -5
amygdule, that is a possibility I never thought of. There are more caves in the area than you can shake a stick at. It is doing well in the 500 and I expect it will be polished by the weekend or early next week. No hurrying these things you know.
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Deleted
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Post by Deleted on Aug 19, 2015 18:12:17 GMT -5
Not sandstone. I think you are seeing my saw marks. I used a concrete saw to cut it. The very center appears to be porous but the whole thing is very hard. 7-8 Mohs. I did check the slurry a bit ago and it is polishing up VERY NICELY! I will post the finished product at the end of the week when it is finished. It is in with a about 7 pounds of mozarkite I collected with my kids and brother-in-law. It's harder than a quartz crystal? Mohs 8? You ID for reference, is sandstone, that is the source of my query.
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Post by adam on Aug 19, 2015 18:57:31 GMT -5
Looks like the grain of petrified wood. The colors are nice. Sandstone is a rock, doubt it would take a polish.
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Deleted
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Post by Deleted on Aug 19, 2015 19:26:51 GMT -5
Stalagmite and its sister stalagtite are going to be MOHs 3.5 as far as I know. Quartzite is a sandstone that polishes. I am going out on a limb and say it's a form of rhyolite. Sabre52
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patrock
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Post by patrock on Aug 19, 2015 22:47:31 GMT -5
After 24 hours in aluminum oxide polish it is looking wet. I put it back in for a day or two more. Will have pix soon. Thanks for the comment. I will check out rhyolite.
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patrock
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Post by patrock on Aug 19, 2015 23:34:24 GMT -5
Stalagmite and its sister stalagtite are going to be MOHs 3.5 as far as I know. Quartzite is a sandstone that polishes. I am going out on a limb and say it's a form of rhyolite. Sabre52$hotgunner, I really appreciate your help with the id. It looks you may be onto something. This was after 500 pre-polish. I have some other similar stuff coming out in a week or so but it is black and white. Similar pattern though. I deliberately left one side rough to show its 3d texture. As far as hardness, I would say it is right up there with quartz. I cannot be more specific on the hardness . It is chert-like. I have some quartz tumbling with it but didn't show it because it was from elsewhere.
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Deleted
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Post by Deleted on Aug 21, 2015 2:30:10 GMT -5
Greetings [patrock] firstly may i welcome you to RTH Forums, it looks like fortified Rhyolite to me. Rhyolite has the colors & fortification banding like an agate, but it is not a mineral, it is an Igneous class rock. Please check out my Sticky's below. -- Please click images to open larger images in a new Tab, same with everything that is Underlined! I currently have a 3lb Beach (UK), Lortone QT 12/66 (USA) rotaries & 2x Viking Vibrasonic (Diamond Pacific) (USA) virbrating tumblers, with Silicon Carbide grit F80, F220, F600, F1200, with Tin Oxide (1.0 micron) & Aluminum Oxide (1.0 micron & 0.3 micron) polishes. I hail from (The Barony of Seabegs) Bonnybridge, Stirlingshire, U.K, where aliens (15mb) sometimes come for a visit & about 4 miles west from that monstrosity & 7 miles west of this new monstrosity! Sticky's: their contents are resource information 1#: Vendors worldwide (2mb), 2#: How to use the forum, 3#: How to identify rocks & minerals, 4#: Save money on expensive grits & polishes, 5#: Aussie Lapidary Forum: Rock Tumbling Guide!
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patrock
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Post by patrock on Aug 23, 2015 9:32:07 GMT -5
It's petrified wood. I have no doubt left.
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patrock
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Post by patrock on Aug 24, 2015 14:12:28 GMT -5
It's petrified wood. I have no doubt left. Okay ASI Industries and $hotgunner, I now have doubt. It seems that you are correct. I am certainly a novice at this. Geology is definitely not my field. Rhyolite would explain some of the other forms that I found in the same area. Here is the reverse side of the specimen in question. Crude picture but you can see the form. And here is the finished face. There is another similar form in the lower left. The area we were hunting in has a good deal of this type of stuff. I am a bit unclear as to how it forms. If I am understanding it correctly, magma goes through some type of laminar flow and liquids of different viscosity flowing in different directions form the layers. Does that sound correct? Thanks again.
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jamesp
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Post by jamesp on Aug 24, 2015 14:39:38 GMT -5
In cartersville Georgia there is deposits from an old cave that has stalactites piled deep from a collapse. Thinking they were silicified. One way to tell if it is possibly a stalactite is it should be(very) concentric tubes instead of concentric spheres, like pet wood and not like Brazilian agate. Rhodochrosite stalagmite
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patrock
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Post by patrock on Aug 24, 2015 15:01:57 GMT -5
Helpful information jamesp. That looks edible. Almost like a ham or something candied. Maybe I missed lunch.
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Post by rockpickerforever on Aug 24, 2015 15:26:49 GMT -5
As far as hardness, I would say it is right up there with quartz. I cannot be more specific on the hardness . It is chert-like. I have some quartz tumbling with it but didn't show it because it was from elsewhere. You said it, it is chert-like! Ever hear of banded chert? Pic from Google images.
This is the website it is from: link
Not my pic, but I have some of this found in the nearby desert, a dead ringer. Hard, takes a good polish.. I'd say that is it.
ETA - Here's a pic of some I found. Bottom piece shaped/polished on flat lap.
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