400 cts Random Scoop of Low Grade Koroit boulder/matrix ironstone pieces from Queensland Australia size range 20mm to 5mm size range

This is a random scoop/parcel of pieces of Koroit ironstone boulder/matrix  From the opal fields of Queensland This is low Grade boulder / matrix opal This has only some little bits of colours. Some pieces have no colour. This is for learning to cut and polish  From 25mm to 10mm  you will receive 400cts at random . Details: #KBS400 Weight:  400cts Grade:  ironstone boulder Base Colour:  Boulder tones Source: Queensland AUS Field: Koroit Size:    25mm to 10mm size range Type:  Low Grade Boulder random scoop parcel Colours: ,only some bits State : In the Rough Solid, Natural, Untreated Opal