Things you didn't know.

**Perthbum** · 09-08-2012, 08:29 AM

To test if anything is pure gold test it in vinegar...Real gold will shine while fake gold will change colors in reaction to the ascetic acid
.

**BritChickx** · 09-08-2012, 08:36 AM

Isn't that how you clean coins anyway though, so the reason real gold would shine is cos it's getting cleaner? lol. Or is that silly.

**PaulandDeb** · 09-08-2012, 08:39 AM

You bite gold to check for hardness, NOT softness - fake gold is normally made from lead so it was bitten to see if your teeth sank into it

Q-I or what?

**Perthbum** · 09-08-2012, 08:44 AM

Originally Posted by BritChickx

Isn't that how you clean coins anyway though, so the reason real gold would shine is cos it's getting cleaner? lol. Or is that silly.

silly.

**Bobj** · 09-08-2012, 07:31 PM

The gold and silver olympic medals are made from sterling silver (.925 fine). The gold medals must be plated with 6 grams of gold. The bronze medals are actually made of bronze ( copper, zinc, tin and a dollop of silver).

Cheers, Bobj.

**StevieF8** · 09-08-2012, 07:33 PM

Originally Posted by Bobj

The gold and silver olympic medals are made from sterling silver (.925 fine). The gold medals must be plated with 6 grams of gold. The bronze medals are actually made of bronze ( copper, zinc, tin and a dollop of silver).

Cheers, Bobj.

Medal specification

- The London 2012 Olympic medals weigh 375-400g, are 85mm in diameter and 7mm thick.
- The gold medal is made up of 92.5% silver and 1.34% gold, with the remainder copper (a minimum of 6g of gold).
- The silver medal is made up of 92.5% silver, with the remainder copper.
- The bronze medal is made up of 97.0% copper, 2.5% zinc and 0.5% tin.

**Bobj** · 09-08-2012, 07:50 PM

Originally Posted by StevieF8

Medal specification

- The London 2012 Olympic medals weigh 375-400g, are 85mm in diameter and 7mm thick.
- The gold medal is made up of 92.5% silver and 1.34% gold, with the remainder copper (a minimum of 6g of gold).
- The silver medal is made up of 92.5% silver, with the remainder copper.
- The bronze medal is made up of 97.0% copper, 2.5% zinc and 0.5% tin.

Virtually all the gold, silver and copper was mined in Salt Lake County, Utah in the U.S.

(extract from Wiki)

Cheers, Bobj.