Vintage amethyst and marcasite sterling silver dangle earrings

These are a pair of pre owned vintage earrings in excellent condition showing some moderate signs of gentle use and age. Please see all photos.  Genuine purple chevron faceted brioliottes hanging from the bottom of what appears to be brass spheres encrusted with mercasite gemstones. Stung onto a gold tone chain with sterling silver ear wires. Please note I couldn’t find any purity stamps on the silver or other metals but there were obvious signs the ear wires are sterling silver. I acid tested the ear wires and verified purity of at least 92.5% silver . ( 925 sterling silver). As far as I can tell these are the only part that are made of sterling. Unsure of age and maker. Possibly artisan crafted. Total weight is 13.73 grams. Reasonable offers considered