Crystal Butterfly Pendant, silver chain, Blue with Aurora Borealis

EUC. This butterfly pendant and chain are in excellent vintage condition with no flaws noted. The butterfly is set in silver and has blue and aurora borealis (rainbow hues) crystals. The chain is unmarked silver, not polished, and is approx. 18 inches. The clasp pinches open to connect and works fine but is it kind of small and requires some dexterity.