Go bold in green. Aventurine and Green Onyx come together in a statement geometric ring with a distinctly Deco feel. 18k gold plated, 100% recycled sterling silver Collet is 13.6mm x 11.6mm One 6mm x 4mm Emerald-Cut Green Onyx One 12mm x 10mm Aventurine Ring band tapers from 1.2mm to 2.9mm