Australian Opal Plain Rounds average approximately 10mm diameter in size, these Opals have a waxy luster with good polish creating a symmetrical round shape, the beads show a moderate matrix of a warm grey hue, these Australian Opal beads have body colors are a dark grey to a light cream hue, these gems present with an opaque quality with slight crazing, and these common Opals are mined in Australia and have 1mm inside diameter holes with some fracturing around the drill holes.