victor1941
fully equipped rock polisher
Member since November 2011
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Post by victor1941 on Jan 3, 2022 10:23:30 GMT -5
I agree with Peruano that the surface looks manmade. To me it looks like a scribed/dragged surface with a softening or rounding of the edges. Lines that abruptly intercept and stop look manmade. I have demonstrated different textures on ceramics when teaching art classes that are similar. Also notice the well defined edge of the hole.
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Lumberlegs
fully equipped rock polisher
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Post by Lumberlegs on Jan 3, 2022 10:27:43 GMT -5
I agree with you guys, it looks too clean to be random. I put the hole there with my dremel, but that's the only thing I've done to it.
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Tommy
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Post by Tommy on Jan 3, 2022 15:52:29 GMT -5
I agree with you guys, it looks too clean to be random. I put the hole there with my dremel, but that's the only thing I've done to it. Very intriguing stone - I've been following this thread for a while out of curiosity. A lot of possibilities can be eliminated with a simple streak test. A quick and easy way is to turn a ceramic toilet tank lid upside down and (cautiously) try to draw with the rock on the surface much like you would do with a crayon but with increasing levels of pressure. From the wiki page, jet is said to streak brown. |
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Tommy
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Post by Tommy on Jan 3, 2022 15:55:40 GMT -5
Lumberlegs - my other thought was what color did the water turn when you were drilling the hole?
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Lumberlegs
fully equipped rock polisher
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Post by Lumberlegs on Jan 3, 2022 16:15:25 GMT -5
Tommy I feel like your pulling my leg asking to check for brown streaks on my toilet... I wish I could remember what color came out, I think it was the first stone I ever drilled I found this little step by step to check for specific gravity www.johnbetts-fineminerals.com/jhbnyc/articles/specific_gravity.htm , I'll give this a shot and check for color and knife scratch.
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Tommy
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Post by Tommy on Jan 3, 2022 16:21:55 GMT -5
Tommy I feel like your pulling my leg asking to check for brown streaks on my toilet... Hahaha nope, dead serious. The rough ceramic side of the tank lid is the perfect medium to streak test a rock. |
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Post by hummingbirdstones on Jan 3, 2022 20:19:59 GMT -5
Tommy I feel like your pulling my leg asking to check for brown streaks on my toilet... I wish I could remember what color came out, I think it was the first stone I ever drilled I found this little step by step to check for specific gravity www.johnbetts-fineminerals.com/jhbnyc/articles/specific_gravity.htm , I'll give this a shot and check for color and knife scratch.  |
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Lumberlegs
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Post by Lumberlegs on Jan 3, 2022 20:27:13 GMT -5
Alright, so I gave it the streak test, made 4 passes with increasing pressure....not much happening. I'd say dark grey, more of a pencil lead than charcoal if that makes sense. color in picture holds true. Tried scarring it with a screw and knife and while I looked like it made a scratch I was able to rub the scratch out with my thumb. Specific gravity (assuming I did it correct) - stone weight (34.8g)/stone weight submerged (11.7g) = 2.97 Streak Test
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Lumberlegs
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Post by Lumberlegs on Jan 4, 2022 14:27:27 GMT -5
The guys at Mindat mentioned Cryptomelane, getting closer me thinks. |
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Tommy
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Post by Tommy on Jan 4, 2022 15:50:15 GMT -5
Specific gravity ... 2.97 Jade?   I had never heard of Cryptomelane but wiki says it has a specific gravity of 4.17 – 4.41 which I think would make it unusually heavy for it's size. |
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victor1941
fully equipped rock polisher
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Post by victor1941 on Jan 4, 2022 22:28:23 GMT -5
Do you have a good back photo? My other thought is slag.
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Lumberlegs
fully equipped rock polisher
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Post by Lumberlegs on Jan 5, 2022 13:23:03 GMT -5
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Post by jasoninsd on Jan 5, 2022 15:03:02 GMT -5
Tommy I feel like your pulling my leg asking to check for brown streaks on my toilet... Chad, I'm actually ZERO help whatsoever with the ID...but I gotta say...if there was a poll for best post of the year, this would win my vote already! I laugh every time I see your thread title because of this line. LOL I keep imagining you like this when you read his line the first time (minus the long hair! LOL:  |
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Lumberlegs
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Post by Lumberlegs on Jan 5, 2022 15:49:26 GMT -5
Tommy I feel like your pulling my leg asking to check for brown streaks on my toilet... Chad, I'm actually ZERO help whatsoever with the ID...but I gotta say...if there was a poll for best post of the year, this would win my vote already! I laugh every time I see your thread title because of this line. LOL I keep imagining you like this when you read his line the first time (minus the long hair! LOL: I did have to reread it a few times, I wasn't making the connection between toilet and rock very fast  Maybe if this forum was about shite jokes I'd have a shot lol. I'll let the rock stars keep their limelight  |
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Post by jasoninsd on Jan 5, 2022 15:54:10 GMT -5
Chad, I'm actually ZERO help whatsoever with the ID...but I gotta say...if there was a poll for best post of the year, this would win my vote already! I laugh every time I see your thread title because of this line. LOL I keep imagining you like this when you read his line the first time (minus the long hair! LOL: I did have to reread it a few times, I wasn't making the connection between toilet and rock very fast Maybe if this forum was about shite jokes I'd have a shot lol. I'll let the rock stars keep their limelight Flat out...I would've thought someone was trying to pull my leg if they told me to rub a rock on the toilet! LOL However...once Tommy explained it, it totally makes sense.  Crap jokes belong in the Coprolite thread anyway! LOL |
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jamesp
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Post by jamesp on Jan 6, 2022 12:18:46 GMT -5
How about Hematite or slag. I believe there is a specific color that Hematite puts out when streak tested(red ). Those streak tests don't look red though... Native man used Hematite for red stain(red ochre) constantly. He would (saw) rub the sharp edges of his spearheads to both stain the perimeter of the edge and generate Hematite powder. Hematite lasts for centuries when applied to boulders as red images(hieroglyphics). Low grade hematite can be fairly low density. Even when it is low grade it can weather to a fairly shiny patina. This guy probably used this hematite to rub on his arrow shafts to make them red (so he could find them ?).  Handy work  Whatever it might be a Native person could have put the scratches on it. They appear weathered/water worn. |
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jamesp
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Post by jamesp on Jan 6, 2022 12:36:50 GMT -5
Meteors(meteorites/meteors rockpickerforever ? (I don't want to get it wrong !)) often have streak marks. It could be space born. Makes a great story ! |
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Lumberlegs
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Post by Lumberlegs on Jan 6, 2022 12:44:16 GMT -5
jamesp I don't think it's hematite or slag, it has more of texture and luster like jade as Tommy suggested, though I'm just judging that based on what I'm seeing online lol. The best answer so far in my opinion, someone suggested that it looks like Komatiite (which has what is called a spinifex texture) out of Northern Ontario, it's not exact match color wise though.  
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jamesp
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Post by jamesp on Jan 6, 2022 12:49:15 GMT -5
Go with the more experienced opinions, not me lol. Certainly a curiosity piece.
Those so look like man made scratches in some ways, but where they intersect at an almost 90 degree angles creating an abrupt termination in the groove is perplexing.
A real curio.
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Post by rockpickerforever on Jan 6, 2022 15:39:51 GMT -5
Meteors(meteorites/meteors rockpickerforever ? (I don't want to get it wrong !)) often have streak marks. It could be space born. Makes a great story ! , not saying it is or isn't one, but to clarify - meteor when in space, meteorite when it hits the ground. I'm unsure of what Chad's Lumberlegs stone is, so have not commented on it yet. In addition to what it looks like, hardness, density, and scratch test result, one must still consider where it was found - On the shore of Lake Michigan! When I first saw it, it looked organic, almost like a coconut shell with striations cut into it. But you have examined it (heck, wear it around your neck every day, lol!), so you k now it is, in fact a hard stone.That aside, where would it have come from? How would it have gotten there? Things that don't belong in a certain area, can either have been transported there by natural action (rivers, floods, or glaciers), transplanted by humans (Native Americans), or even been dropped overboard from a vessel on the lake transporting things. Or, it could be 100% natural. I have a small black/dark brown stone found in the desert, most likely from Ocotillo Wells, that resides on my dresser. It, too, has intrigued me what it is. It has ridges on it suggesting petrified wood, but it has a "soft" look to it. I'll take a few pics and post them. Unlike you, I am lazy, and have done no testing on it for density, etc. I have not even weighed it. |
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Mountain DEW, and Mountain Don't. (sorry-2)
glad someone knows what their doing ...
Water, water everywhere, and the very boards did shrink 
