Geologists, and other assorted losers...what kind of rocks are these?

[NotActuallyALonghorn 4976]

https://images2.imgbox.com/15/ad/KwMlSm0G_o.jpg

All from the same spot in central Mexico. The ones I found before threw a pretty decent spark for my flintlock without destroying themselves. 

[immamac 42857]

Use the attachment feature. 

[South Austin 52515]

New thread title:  Website administrators, and other assorted losers . . . how do you post images?

[NotActuallyALonghorn 4976]

Gracia, Imma. Internet is too slow here to get the autism-imbed to work. The mezcal probably didn't help much either. 

[TwiceHorn 31489]

I might guess flint or chert or one of the variations of small-crystal quartz.

[RDCanecutter 26446]

15 hours ago, NotActuallyALonghorn said:

All from the same spot in central Mexico. 

I believe that makes them "piedras."

[davidg 4038]

[52-80 19162]

17 hours ago, TwiceHorn said:

I might guess flint or chert or one of the variations of small-crystal quartz.

looks like boring chert and typical siliceous ooze

[Jiggy-Z 3432]

 

...would also have accepted "dateless wonders".

[MadTrapper 153]

@TwiceHorn geologist AND a lawyer? A true Texas rock hound.

[TwiceHorn 31489]

I just like rocks. Kicking them boxes of them, etc. 

[Bevo&Pevo 5176]

So, any ideas on this one?  Found it in Zapata Co.  Very black in color and the white part is somewhat soft.  If you work at it; you can scrape/pick some out.  Quarter for size refence, along with usual junk in my pocket.

[Bevo 13577]

The upper stuff looks like feldspar.

The lower one might contain calcium or possibly sodium. It looks like a wishing stone which has a quartz band but that band wouldn't be soft.

[NotActuallyALonghorn 4976]

Found this one today on the same property. Might belong in a different thread. 

 

[52-80 19162]

On 7/7/2024 at 2:48 PM, Bevo&Pevo said:

So, any ideas on this one?  Found it in Zapata Co.  Very black in color and the white part is somewhat soft.  

 

 

 

Thats a metal cross, a steel knife, and a coin made up of nickel-copper. 
 

jesus christ people. 

[freyguy 4277]

no no, that's a Styrofoam plate

[Grimas 669]

Does it look like glass (It looks like it reflects like it and has conical fractures in the photo)? If so it's probably obsidian.

[Bevo 13577]

22 minutes ago, Grimas said:

Does it look like glass (It looks like it reflects like it and has conical fractures in the photo)? If so it's probably obsidian.

 

I'm sure it is obsidian. But, what I don't get is why he is showing random pictures of rocks to us.

[NotActuallyALonghorn 4976]

I thought it pretty obvious that that is a broken point made from obsidian. The other stuff is really what I was curious about. Some of it is almost glass like in it's translucency. Yet it is tough enough to last just as long as a piece of English flint when I manage to knap a piece into the right shape to use in my flintlock. My understanding is that quartz us generally too brittle to last more than a few shots when used as a gun flint. 

[NotActuallyALonghorn 4976]

Here's a picture of one of them from a couple years ago chucked up in my very dirty flintlock after a long shooting session.