I know that gold shows different TID's for different karat rated jewelry because of the different metals that are mixed in. But I am assuming that gold coins are, for the most part, all made of the same composition. That being said, has anyone on here found a gold coin? and what were the numbers reading? The reason I am asking is because a friend of mine recently informed me that the previous owner of his house was rumored to have buried a cache of gold coins in the yard. He apparently was a "gold coin hoarder". When he died over 20 years ago he had over $30,000.00 in gold coins stashed around the house. Whether or not he actually did bury any in the yard, we may never know, but I sure am going to try to find them. Any help would be appreciated.