Beautiful Silpada necklace! Fully marked for brand and sterling silver. Materials used might be an olive green Nephrite Jade, Serpentine or possibly a chartreuse Jade, Bronze, and either a milky white Jade, or quartz. Small wooden dark brown disk beads. Fabulous piece! I would call it earthy, calming, grounded, and natural. Perfect from day to night. 18.25" to 20" long with extender. Larger facetted barrel stones are about .75" long each. I will polish the clasp and extender before shipping out. Excellent clean condition. I pack with care. Sales are final, questions welcome. No trades please. Smoke and pet free home.