Marcasite pendant & chain Necklace silver tone with mother of pearl ? CW Thai

Marcasite ? Mother of pearl ? necklace silver tone design + CW mark chain round tag, CW Thai on pendant backside + possible sterling silver but not sure 📍PRE-OWNED - good condition with general/normal wear- possible tarnish, scratches, smudges/marks, fading inside and out, dents 📍PHOTOS - Review photos carefully as they are part of the description/selling info. of this listing item 📍MEASUREMENTS - Please review photos for approximate measurements 📍QUESTIONS - Message me if you have any questions before buying 📍I'm NOT a jewelry professional/gemologist and only provide the information I know about the item