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
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.
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?
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).
- 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.
It's not who I am underneath, but what I do that defines me.
All the gold for the 2000 Sydney Olympics was mined at Ophir in NSW
One of the tunnels supplied gold for medals at the Sydney Olympics.
Read more: http://www.theage.com.au/opinion/pol...#ixzz2356M9Rtr