Sterling silver necklace Purple Gemstones 18"

This is an 18" Sterling silver necklace marked 925 at the necklace clasp. The necklace has small intermittent silver beads within the chain. At the bottom of the chain are small purple beads (8) threaded with the silver and at the bottom hangs a large raindrop/teardrop purple gem stone. In the pictures, the ones that look purple are the correct color of the gems. The ones that look pinkish are not the correct color. The gem stones are attached so I don't believe you can remove them from the necklace. It appears to be all attached So you won't be able to use the necklace with another pendant. This necklace is in good condition. Pre owned