I take a classic white Coin Pearl and frame it with one of my fine silver handcrafted circles.
The circles are created by taking fine silver wire, shaping into a circle, fusing with a torch, hammering for strength, then tumbling for shine.
 
The Coin Pearls are 11-12mm in diameter and circles are ~ 1".
 
Coin Pearls are natural and should be treated with care. 
Fine silver is 99.9% silver.
 
All silver will tarnish over time. Keep away from moisture and any chemicals (think hairspray or perfume). I like to keep mine in a plastic bag when I'm not wearing them.
 
Your pair may be slightly different from these, but just as beautiful! 
(Color of the stones may vary from monitor to monitor.)