Abstract and unique, this gemstone necklace is certain to receive compliments. Fashioned in sterling silver, this artful rectangular design showcases a colorful quartet of cushion-cut gemstones: a bright purple amethyst and a soft-green quartz - each 16. 0 x 8. 0mm - and a sky-blue topaz and a golden yellow citrine - each 7. 0mm, wrapped in a frame of shimmering white topaz. Buffed to a brilliant luster, this look suspends centered along a 16. 0-inch cable chain with 2. 0-inch extender that secures with a lobster claw clasp.