Chemical Grey tooth cap

[goldscraphobby]

I found a couple Grey colored tooth cap/crown metal detecting. I think they tested around 10k but wasn't sure due to the color was thinking mostly silver. The place I take the scrap gold to wouldn't take them and have been sitting around a long time. Got tired of looking at them so I flattened them very thin and put into dilute nitric. Did not expect this color. Was hoping to dissolve the junk metal and then AR. Not sure what this color is for.

 

[Yggdrasil]

I found a couple Grey colored tooth cap/crown metal detecting. I think they tested around 10k but wasn't sure due to the color was thinking mostly silver. The place I take the scrap gold to wouldn't take them and have been sitting around a long time. Got tired of looking at them so I flattened them very thin and put into dilute nitric. Did not expect this color. Was hoping to dissolve the junk metal and then AR. Not sure what this color is for.

That color look like a Palladium salt.

 

[goldscraphobby]

That color look like a Palladium salt.

Thanks. Something new to look into and research.

 

[Yggdrasil]

Thanks. Something new to look into and research.

The salts from PGMs are very toxic.
Do not touch them.
Wear full protective gear when handling them.
I suggest you cement them on Copper immediately.

 

[goldscraphobby]

The salts from PGMs are very toxic.
Do not touch them.
Wear full protective gear when handling them.
I suggest you cement them on Copper immediately.

So I've read. I saw copper requires aggressive agitation, zinc not so much so use a couple pennies?.
Have to figure out what to do with a couple grams of palladium.
Thanks

 

[Shark]

Most pennies since 1982 are copper plated zinc. Before 1982, they contained more copper, but still not pure copper. Spilt a piece of copper pipe open and flatten it out. Works great and provides a larger surface area for cementing.