These are 2 vintage crystal drink coasters. It is stamped silver plated Italy. The rims of these coasters are silver plated equaling 4 grams of silver per coaster (per research). These were made somewhere between 1960 and into the 1970's and will stun guests today.

Polish them to a shine, or leave them aged these are truly beautiful

Coasters are about 3" across inside, and 4" across outside