SPIKES Tungsten Carbide Abalone Step Ring. Tungsten Carbide Abalone Step Ring. This Abalone inlay comes in a rainbow of colors and can appear to change color when viewed from different angles. Sometimes Abalone is also called "mother of pearl". Featuring steps between a polished tungsten carbide and abalone accents you too can be a lustrous sight to see. Tungsten Carbide men's ring available in sizes 9, 10, 11, 12 and 13. Band measures 8 mm. SPIKES stainless steel jewelry is a trendsetting 316L jewelry collection created for today's stylish men and women who want leading-edge jewelry designs. SPECIFICATIONS: Tungsten Carbide, Cobalt Free, Abalone Shell Inlay, Available in sizes 9, 10, 11, 12 and 13