Got A Rock you Want Identified? Post it here! gimme a good picture or 3 or 4!

[GoldWiz]

Found these in south central Ohio. The are a little bigger than a pea and are quite heavy. Found while gold panning and they would not pan out, one of the few things left in the pan. They feel almost as heavy as lead to me.

The triangular structures are tied together in pairs. Here are the best pictures I have. I took them with my little iPhone microscope. The first picture is with them on the kitchen table.

 

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[uzd]

Gault Chert



disregard Quartz embryno. Can't get any info on this chert. Retrieved from my prop. in CenTex. Exterior of nodule same as plain ol Ed. Plat. root beer. Any informed opinion would be nice.
Only other specimen I could find was a point from the Gault dig. It was the only example of it in their picture gallery.
Thx

 

[Guru]

specific gravity = 3.45

 

[Eu_citzen]

Hello, I have a rock my dad found in North Eastern Kansas and the only thing I can find on the interwebs that looks even remotely like it is raw platinum but i took it by a precious metal and gem shop and they said it wasn't heavy enough or dense enough to be a precious metal and had no idea what it was. I'm far from an expert, but this rock feels a lot heavier than most other common rocks of the same size. It measures 6" x 4.5" x 7" and weighs about 18lbs. The surface has directional lines on it that make it look like it has been in a liquid or semi liquid state at one time and has small holes that i can only best describe as worm holes in it. They appear to mostly be on the outside of it though where i broke a small piece off there are a couple on the very edge and the middle looks to be pretty solid.

Any ideas?

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Slag.

 

[Eu_citzen]

Found these in south central Ohio. The are a little bigger than a pea and are quite heavy. Found while gold panning and they would not pan out, one of the few things left in the pan. They feel almost as heavy as lead to me.

The triangular structures are tied together in pairs. Here are the best pictures I have. I took them with my little iPhone microscope. The first picture is with them on the kitchen table.

View attachment 1356970View attachment 1356972View attachment 1356973View attachment 1356974View attachment 1356971

A streak & hardness test would be helpful:
Will a knife scratch it? If rubbed against unglazed porcelain, what color do you get?

 

[GoldWiz]

A streak & hardness test would be helpful:
Will a knife scratch it? If rubbed against unglazed porcelain, what color do you get?

I will try that and post back results. The best guess I can come up with is it is chalcopyrite although I have not found any examples of such that look like what I have.
I have seen a number of other examples of similar material in my gold pan but not with the defined crystal formations of these.

Thanks for the reply.

 

[hvacker]

And this one...

I have a few more to post for ID that need photo's that will follow if these are ID'd.

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Looking through my gem book I wondered if spodumene ( kunzite) might fit.
The examples on Minedat seem a bit more translucent.

 

[Guru]

 

[Guru]

what is that gem please ?

 

[desert-rat]

found this stuff in rock form and ran it in the crusher, then the sluice and last the pan. I have about 8 oz of the stuff and no idea what it is. its out of a tailings pile from a 3 metals mine in southwest az. these pictures are with a digital microscope at 100-800X. any one have any ideas?

 

[Guru]

specific gravity near 4

 

[chriseneim]

 

[bc5391]

3 to identify

I have 3 rocks to identify. The first was found in Southern California in the early 1980's. It appears to have the center filled with a limestone. Found near the Colorado River. I was once told it was a petrified knew cap.
The second was found this week, the valley it came from is covered with large boulders (house size and smaller) also there are solid cliffs. It appears to be a river rock covered with lava.
The 3rd was found a few weeks ago, it is the color of root beer.

 

[Golden_Crab]

The above is definitely the result of a pyroclastic flow, the bottom piece is obsidian.

 

[Assissel]

Please help me to identify this

Please help me to identify this

 

[JM2855]

Epithermal Plate/Bladed Hardrock Textures?

I have a large section of hard rock in the spine of this old mine tunnel that is Bladed Plate like pattern textures. I've read that this texture is caused by boiling of fluids in epithermal deposits but haven't seen enough of them to confirm that this is what this is. Anyone seen these very distinct textures before that can confirm one way or another what this might be or the cause of the Bladed textures in the rock?

There's obvious stockwork veining next to it on the right in this picture. (Have not assayed it yet).

Thanks!

 

[lop0kus]

I farm and found pieces only in two fields within a mile of eachother. I noticed them because they didn't look like all the other rocks in the fields near by. Some pieces are large and others real small.The large one on the Right side weighs about 7.8lbs. The one on the left is a little bit over 4 lbs. They are all magnetic. Not entirely only certain areas. What do you think?0

 

[Pseudonym]

I found this rock at the beach and I thought it was pretty because it was sparkly. A long time later I cracked it open and the inside was super shiny. At first I thought it was obsidian, but I can see by looking at smaller fragments that it is distinctly purple, perhaps with hints of red. It is really beautiful and I would love to know what it is. Thanks!

 

[Golden_Crab]

^^^ petrified wood

 

[jere64ca]

I found this rock at the beach and I thought it was pretty because it was sparkly. A long time later I cracked it open and the inside was super shiny. At first I thought it was obsidian, but I can see by looking at smaller fragments that it is distinctly purple, perhaps with hints of red. It is really beautiful and I would love to know what it is. Thanks!View attachment 1369350View attachment 1369353

Garnet would be the most likely.