Boulder opal stone plugs! These plugs are natural and handcrafted with marble-like, opal designs throughout. This pair you see here is what you will receive when you purchase. Natural divots due to the nature of the stone. This is version 4 of 4 in this 3/4" size. Size is 3/4" (19.5mm). Wearable area is 8mm. Full length is about 9mm-10mm. Handle with care. Sold in pairs (2 pieces). For healed lobes.