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.

 

[nickvc]

If you use zinc chances are you will cement virtually all the metals you dissolved so you are back to the start again.

 

[goldscraphobby]

If you use zinc chances are you will cement virtually all the metals you dissolved so you are back to the start again.

Only looking to get any gold, due to the toxicity I want to pour it off and drop it to metal. If someones wants this dropped waste they can have it. Just going for the gold, don't need another thing to process especially if it's this toxic,

 

[Yggdrasil]

Only looking to get any gold, due to the toxicity I want to pour it off and drop it to metal. If someones wants this dropped waste they can have it. Just going for the gold, don't need another thing to process especially if it's this toxic,

Drop the Gold with Iron Sulfate or SMB and then cement rest with Zinc or better Copper.

 

[goldscraphobby]

Drop the Gold with Iron Sulfate or SMB and then cement rest with Zinc or better Copper.

Right now it's just dilute nitric, will drain off, rinse the gold (hopefully all that's left), drop this PD mix and get rid of it.

 

[Dr. A]

Dental crowns metal detecting?? That’s unusual! As a dentist I send dental scrap to Garfield refining. They melt, assay and give you the value of Au, Pt, Pd, Ag. Minus 5% for processing. They will send a check or bullion. In fact I’m sending a batch today but keeping the yellow gold ones for now. The white gold can be any % range of gold, palladium is very common in high nobel alloys, but gold can be even 40%+ in the silver looking ones, or they can be all base metals, chrome, cobalt, nickel. The palladium values I get sometimes are nothing to sneeze at and can be as much as the gold values. Maybe I’ll try refining yellow gold crowns someday. Practicing on gold fingers first from eWaste. Still learning and no time to process!

 

[nickvc]

Dental crowns metal detecting?? That’s unusual! As a dentist I send dental scrap to Garfield refining. They melt, assay and give you the value of Au, Pt, Pd, Ag. Minus 5% for processing. They will send a check or bullion. In fact I’m sending a batch today but keeping the yellow gold ones for now. The white gold can be any % range of gold, palladium is very common in high nobel alloys, but gold can be even 40%+ in the silver looking ones, or they can be all base metals, chrome, cobalt, nickel. The palladium values I get sometimes are nothing to sneeze at and can be as much as the gold values. Maybe I’ll try refining yellow gold crowns someday. Practicing on gold fingers first from eWaste. Still learning and no time to process!

My advice if you don’t really need the cash from your scrap keep it until you have time to learn how to either refine it or melt it and sell on after taking a drill sample at least.

 

[4metals]

I agree with Nick, 5% seems like a very good deal. If you were to accompany the material and witness the melting and sampling, would the same rates be given?

 

[Alondro]

Dental crowns metal detecting?? That’s unusual! As a dentist I send dental scrap to Garfield refining. They melt, assay and give you the value of Au, Pt, Pd, Ag. Minus 5% for processing. They will send a check or bullion. In fact I’m sending a batch today but keeping the yellow gold ones for now. The white gold can be any % range of gold, palladium is very common in high nobel alloys, but gold can be even 40%+ in the silver looking ones, or they can be all base metals, chrome, cobalt, nickel. The palladium values I get sometimes are nothing to sneeze at and can be as much as the gold values. Maybe I’ll try refining yellow gold crowns someday. Practicing on gold fingers first from eWaste. Still learning and no time to process!

Dental crowns from metal detecting... maybe the rest of the mob hit's skeleton was a little deeper underground!! :O This... wasn't in NJ, was it? Because... well... the Pine Barrens has a LOT of bodies hidden in it... o________o

 

[goldscraphobby]

Dental crowns metal detecting?? That’s unusual! As a dentist I send dental scrap to Garfield refining. They melt, assay and give you the value of Au, Pt, Pd, Ag. Minus 5% for processing. They will send a check or bullion. In fact I’m sending a batch today but keeping the yellow gold ones for now. The white gold can be any % range of gold, palladium is very common in high nobel alloys, but gold can be even 40%+ in the silver looking ones, or they can be all base metals, chrome, cobalt, nickel. The palladium values I get sometimes are nothing to sneeze at and can be as much as the gold values. Maybe I’ll try refining yellow gold crowns someday. Practicing on gold fingers first from eWaste. Still learning and no time to process!

Dr. A your not in PA? My dentist is a Dr. A.
From them detecting the beach, must have been in the ashes.

 

[Alondro]

Dr. A your not in PA? My dentist is a Dr. A.
From them detecting the beach, must have been in the ashes.

If there's a chance they're OLD crowns, you could also have mercury in the solution. SUPER-toxic!

 

[Marcel]

I still have some silver-greyish colored dental scraps here which I tried to dissolve. I know there is some Pd in them but as I researched the compositions of those dentals I found they are often aloyed with many, many metals which will cause cementation, not disolve in nitric or AR and so on. I was not able to disolve my pieces with hot nitric or AR at all. Those alloyed metals are are true pain sometimes for recovery. Reminds me of the tungsten problems with some older CPUs.