C. 1950 Vintage Black Onyx and 1.85 Carat Blue Zircon Ring With Diamond Accents in 14kt Yellow Gold,10k & 12k Tri Color Black Hills JCO Gold Leaves Ring Rectangular Face - Sz 10,10k ONYX and Diamond Signet Ring. 5.5gram Heavy Mens Onyx and Diamond Darkened Yellow Gold Ring. Stock126/50 - Etsy,10k ONYX and Diamond Signet Ring. 5.5gram Heavy Mens Onyx and Diamond Darkened Yellow Gold Ring. Stock126/50 - Etsy,10k ONYX and diamond Signet ring. 5.5gram Heavy Mens Onyx and diamond Darkened yellow gold ring. stock(126/50),