Black onyx beads and sterling silver Sherzada necklace pendant up to 18.25"

Pretty and unique pendant with large teardrop shaped black onyx bead and 5 other beads either black or white/clear with black on a sterling silver chain I believe 4 of the 6 beads are onyx but not sure what the 2 are that are clear or white with black Made by Chicago designer Sherzada in approx 2006 or 2007 Purchased at the old Marshall Fields in Chicago where she sold her jewelry; retail price was about $150 at the time It is approx 18.25" end to end but since the silver circles are good size, it can be worn at ANY length up to 18.25 simply based on where you fasten it Lobster clasp has an oval tag stamped Sherzada with her logo (she made gorgeous jewelry and I have 6 of her necklaces and a few pair of her earrings; don't believe she is actively designing any more as I couldn't find her website) Weighs approx 25.09 grams as pictured In great pre-owned condition; no chips to beads/stones and no issues noted other than sterling is a tarnished; it was worn a few times years ago and kept in a jewelry drawer always when not wearing. But it will have surface scratches visible under magnification as any jewelry that has been worn will have. I didn't try to polish as I like the patina look and know some buyers do too but the sterling could definitely be polished. If you like it, I may decide to list some of my other necklaces - let me know if I should.