Crushed Opal & Hawaiian Koa Wood Rose Gold Tungsten Men's Wedding Ring 8mm,HI-TECH Black Ceramic Ring with Blue Opal & Hawaiian Koa Wood Tri-Inlay (Opal-Wood-Opal) - 8mm, Dome Shape, Comfort Fitment,Tungsten Carbide Ring With Fire Opal & Koa Wood Tri Inlay,Koa & Blue Pacific Opal Waves – My Roots Jewelry,HI-TECH Black Ceramic Ring with Blue Opal & Hawaiian Koa Wood Tri-Inla