Copper core, surrounded by gold (acid tested), and other metal objects

[Crispin]

Okay, this is a new one on me...What in the world is this and why would a copper core be surrounded in gold? Also, found a copper nail, why? Lastly, this thing tested as platinum. My hunting buddy got one too. I am open to the suggestion that the silver colored thing is another metal. I will be doing research to try and figure out what...

 

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[G.I.B.]

You manage to find some strange stuff. How about a normal old coin or something?

That one object looks like a bronze screw with the threads stripped off. I don't know about the others.

 

[Ant]

I would say the gold item was either Rolled Gold, Gold Fill, or lastly Heavy Gold Eletroplate over copper base metal.

 

[Bigcypresshunter]

Yea it looks like an old wood screw with the threads worn off. Beach find?

As someone stated gold plated jewelry is usually copper underneath. G.F or H.G.E.

I have no idea on those squarish metal things and I have never used the platinum test solution.

 

[Crispin]

Platinum solution is a mixture of HCl and nitric acid. The HCl is strong enough to dissolve Al, Fe, Sn, Ag, and Au. The Nitric Acid identifies Cu and Zn. Platinum reacts slowly with nitric acid to leave behind a white residue. Which this piece did. Metals that do not react with Platinum solution are Osmium, rhodium, tantalum, titanium, and iridium. Rhodium does not occur naturally and is a byproduct of radioactive isotope decay. It is extremely valuable and highly unlikely to be found on a beach. Titanium is extremely strong and light. Normally utilized in airplanes. Not much use for things that would be found on a beach. Osmium is a great conductor and easily pliable, it is most commonly found as connections for batteries. Iridium is extremely rare and no common use has been found for production. Tantalum is commonly used in medical prosthesis as it has four electrons in its outer shell and is unlikely to be rejected by the body. It is also used in common electronics and gaming systems. This is a legit possibility.

 

[Bigcypresshunter]

Platinum solution is a mixture of HCl and nitric acid. The HCl is strong enough to dissolve Al, Fe, Sn, Ag, and Au. The Nitric Acid identifies Cu and Zn. Platinum reacts slowly with nitric acid to leave behind a white residue. Which this piece did. Metals that do not react with Platinum solution are Osmium, rhodium, tantalum, titanium, and iridium. Rhodium does not occur naturally and is a byproduct of radioactive isotope decay. It is extremely valuable and highly unlikely to be found on a beach. Titanium is extremely strong and light. Normally utilized in airplanes. Not much use for things that would be found on a beach. Osmium is a great conductor and easily pliable, it is most commonly found as connections for batteries. Iridium is extremely rare and no common use has been found for production. Tantalum is commonly used in medical prosthesis as it has four electrons in its outer shell and is unlikely to be rejected by the body. It is also used in common electronics and gaming systems. This is a legit possibility.

I guess you need to scrape a tiny piece of metal on to the stone for this type of (see if it dissolves) testing... ...correct? http://media1.riogrande.com/Content/Platinum-Gold-Silver-Testing-IS.pdf


I think to test a gold plated item you would need to place a drop of acid on the piece itself to test the base metal.

 

[Bumpstick]

I have a cross pen that is 14K Gold Filled.
Could be something from that family.