These are men’s and women’s rings crafted from different color crushed cultured opal on a stainless steel core. Sizes range from 6 to 13 in whole sizes only. Sorry no half sizes. Available colors (from left to right in the photo) are Scarlet Lake, Ultramarine, Lime Green, Brilliant Pink, Emerald Green, Umber, and Violet. Indicate size and color on checkout, either on this site or on PayPal when directed there for payment. FREE SHIPPING! Item may be put on backorder due to on hand availability of materials.