Synthetic Australian Opal EarringsIf you love the look of opal but Genuine Opal is a bit past your price point, then synthetic opal is an excellent alternative. Synthetic opals are man made opals that have the same chemical composition, internal structure, physical properties, and appearance as natural opals. They are often called lab created opals, lab grown opals, or cultured opals to indicate their man made origin. Synthetic opals can exhibit a spectacular play of color appearance