Crystal Opal 6.88 carat Ethiopian is a rare gem that you deserve to wear. Crystal Opal 6.88cts Ethiopian gemstone is unique since it exists in multi-color variety. Its oval shape further adds to its well sort quality by many people as well as weighing 6.88 carats. Crystal Opal has a measurement of 17.21 x 12.78 x 7.40 mm hence perfect in creation of jewelry products.