Stone Type: Treated Fairy Matrix Opal Rough

Stone Weight: 220ct

Stone Size: 59 x 35 x 8.5mm

Origin:  Opalton  QLD, Australia

Color:  Red, Yellow, Green, Blue

Brightness: B3

Shape: Freeform

Treating is similar to used with Andamooka matrix opal but instead cooked in sugar and burn in acid this opal is only burned in oil to turn light brown base to black and enhance color. Treatment usually 1-2mm deep but may go deeper. Cutting deeper may cause brown base come to surface and has to repeat burning process.

Very porous base opal makes it hard to polish. Clear coat is commonly used to make top shiny.

https://www.opalauctions.com/learn/opal-information/history-about-andamooka-opal-and-how-to-treat-it

Picture and video taken stone wet to show full colour.

SOLID ROUGH TREATED AUSTRALIAN FAIRY MATRIX OPAL LOOSE STONE