Please help to identify metal these ancient coins, and metal type

I got these two coins from a garage sale lot, Got both of them for $5.00 USD, they are in Terribad shape, and hard to identify. I think they are roman but I do not know. When I was researching how to tell brass/bronze/gold apart, I came up with Brass is magnetic, which these are not, and gold is soft, bronze is not. I took a stainless steel key from my pocket and pressed it into the coins (Please don't give me grief, they are horrible shape as is) both coins indented fairly easily, and show a vibrant yellow color, and they feel very smooth for how rough they look. I am giddy in hopes they are Gold, but I am not counting on it. I'd rather identify them as bronze, than never know as gold. Both are very heavy for the size, but they are thick.

Please help! thanks

Barnabus!

 

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Gold doesn't corrode like that, so they are most assuredly bronze. The only design I can make out is on the reverse of the first, which is a branch with a bunch of grapes hanging from it. Several ancient civilizations used that motif on their coins, but I'm afraid that's the best I can do.

 

Second one looks like a Syracuse hemilitron...

http://www.acsearch.info/search.html?id=13645