30pcs Natural Multicolour Opal Rough Lot – Unheated Facet Grade Raw Specimens
This product is a lot of 30 pieces of natural multicoloured opal rough, unheated and unfaceted. The opals range in size from 18.5 x 13 x 8 to 12 x 7 x 4.5 mm and have a translucency with iridescent effect.