🔎 UNIDENTIFIED Need help identifying blue vein In blueish clay

[Bertie]

Hey I found this clay atop very orange gravel and clay mix. It has blue veins in it. What is the blue?
I put some HCl in water with it and got a very eggy sulfur smell I presume hydrogen sulphide. I then electrolyzed the sludge/water mix with carbon anode and stainless cathode and got more smell and a layer of yellow sulfur over the non submerged part of electrolyzer. No metal plated out.
I thought maybe I'd see copper.
I fired a piece an it all went red like red brick.
Any thoughts as to what it is?

here's a picture of it dry

 

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[metrotec]

I have found a lot of gold in sticky "blue" clay in North Georgia
Don't know where you found it.

 

[cw0909]

I had remembered a thread here about blue clay, not sure if that blue clay is like yours
you can read here

BLUE CLAY

HI ALL can any one enlighten me on blue clay, i have found a small gully, when i pann the blue clay i get lots of black sand.

www.treasurenet.com

 

[Bertie]

I have found a lot of gold in sticky "blue" clay in North Georgia
Don't know where you found it.

South Island of new Zealand on the beach. It's an ancient river mouth maybe

 

[Bertie]

I'll try pan a bit

 

[tamrock]

I have found a lot of gold in sticky "blue" clay in North Georgia
Don't know where you found it.

Huh! That always peaks my interest when someone says "A lot of gold"

 

[Gare]

Welcome to Treasurenet !!! Lot of very SMART people in that can help you

 

[NJearthman]

Maybe the copper mineral azurite

File:Azurite-kaolinite 1 (32878789928).jpg - Wikimedia Commons

commons.m.wikimedia.org

 

[Bertie]

Maybe the copper mineral azurite

File:Azurite-kaolinite 1 (32878789928).jpg - Wikimedia Commons

commons.m.wikimedia.org

Maybe. There is a lot of sulfur in what I have a have been assuming that the blue was a sulphide/sulphate salt.
Also if it is azurite then it will decompose into the copper 2 oxide (the black oxide of copper). Or is that wrong? Any way if it's copper then it is in the red oxide copper 1 when burnt

 

[metrotec]

Over 1/2 vile for 2 days working with a cohort. It is very time consuming to hand squeeze the clay and hand wash. We used a sluice and got paid for our troubles/
The "blue" clay is the most sticky stuff I've ever worked, and if you don't work it, the clay will pull your fines out of the sluice.