CRAFTED DIAMOND SIMULANTS by Australian Company Secrets Shhh. The Company uses the latest technology in diamond simulants, and made in laboratories from the natural mineral base zirconium oxide. The stones possess all the optical qualities of the finest quality diamonds unearthed. In fact, they are visibly whiter and brighter than most diamonds. Claw setting. White gold, rhodium plated. Stones are each 7mm square. Each stone is 1 ct equivalent in size. Missing one backing. No box.