Amethyst pendant and chain

I picked this stone out from my grandfather’s precious stone collection and he had me this necklace handmade for me. I never really wore it so Im looking to find it a happy home. I am taking a guess that the chain is sterling silver (snake chain not as in as good as condition as the beautiful pendant). I’ve had it for 15 years and it has not turned or tarnished. Message me with any questions! Make me an offer!