1) Keep them in a box or bag that is semi-airtight, or completely airtight
2) Keep the anti-tarnish tab that was sent to you with the original packaging with the necklace (if you purchased before I started including these, please message me and I will gladly send you one)
3) If the piece does begin to tarnish, simply wipe off with a blue polishing cloth, which can be found at any jewelry shop
4)DO NOT SUBMERGE THE STONES IN ANY TYPE OF CLEANING SOLUTION.
This will cause the silver frame to begin to move away from the stone. You may submerge the chain part.