.925 Sterling silver stepped bezel setting with lab created blue opal 6x6mm trillion cabochons. This beautiful green and yellow flash lab created opal is both durable and stylish for all day wear. Stabilized to increase the hardness of the stone, our lab created opal jewelry requires less maintenance than natural opal - approximately 26mm hanging length. The synthetic opal has the flash of premium opal without the need to be overly cautious.