NO RESERVE Australian Queensland Boulder Matrix opal 58cts rough slice Koroit veins of Multifires 29x25x5mm WSS72

This is a nice Boulder opal of the Queensland opal fields. From Koroit mining area , this is a opal in ironstone matrix This has been sliced up to exposed the potential to work with  veins of Multifires showing on exposed face lots potential here Please note boulder opal is ironstone host rock with deposits of opal. Details: #WSS72 Weight: 58cts Grade: POTENTIAL GRADE Base Colour:  Boulder tone Source: Queensland Australia Field:  Koroit Size: 29x25x5mm Type:   Koroit Boulder faced rough Colours: multi colours to veins State : In the Rough sliced Solid, Natural, Untreated Opal, Ironstone Host rock