Chrysoprase Green Glass Heavy Statement Necklace

One stone panel is broken toward the back of the necklace. No missing rhinestones. Light wear on hardware. The necklace appears to have possibly been modified or artisan made. Very heavy and beautiful. Stones test in the "Chrysoprase, Emerald, Nephrite" region of the Presidium Gem Tester II. Could be nephrite but not sure. Measures 21" long. This is truly a stunning necklace!!