Help identify token

The only thing I got on this is that it says "Recuerdo Matrimonial" (marriage souvenir, basically)  and that it's Mexican.  Anyone know what type of metal it may be?



Thanks  

http://coinquest.com/cgi-bin/cq/coins?main_coin=11084
http://users.pullman.com/fjstevens/tokens/ArrasTokens/Designs/DesignList.htm

Thanks for the links! I have no idea how to determine if this one is silver though. All I know is that it isn't magnetic, and I don't have a scale to try a density test.
Thank you for your quick response, though!  

You can try the 'ring' test:
put the coin on the top of your finger and then tap the edge of the coin with something hard plastic.
Compare te sound with a coin the is silver.