Rough opal from Coober Pedy is ideal for first time cutters as not as expensive as black opal but some have interesting colour bars to cut n polish .virgin opal rough also is obtainable from this field ,basic parcels are good to start with and when experienced try rough that has multiple colours and make good cabochon stones. Source your Coober Pedy opal rough direct from opal miners and opal wholesalers and dealers for your single gem rough opal or parcel Coober Pedy rough opals from South Australia