Multi-strand Necklace. Try this unique classic designed black bead gemstone necklace. What a prefect black and green necklace buy as an office accessory. 5mm frosted black onyx beads are paired with pale 10 by 8mm kiwi jasper small nuggets for this 18 inch double stranded Black Onyx and Kiwi Jasper Necklace. This Handmade necklace is finished with a simple hook and eye sterling silver clasp. This black and green bead necklace is classic timeless style. This Black Onyx and Kiwi Jasper Necklace is from our Classic Gemstone Collection of fine handmade jewelry. Handmade in USA. Exclusive.