C. 1990. Brimming with cool, serene color, this Estate collection ring flaunts a 10.5x5.5mm rectangular jade cabochon, sided by dewy round d… C. 1990. Brimming with cool, serene color, this Estate collection ring flaunts a 10.5x5.5mm rectangular jade cabochon, sided by dewy round diamonds set in bright 14kt white gold stations. Crafted in polished 14kt yellow gold. 5/16" wide. Jade ring. Exclusive, one-of-a-kind Estate Jewelry.