Australian Boulder Opal Rough Specimen

Overview
A Natural Australian Boulder Opal Rough Specimen Displaying A Prominent Vein Of Opal Running Through An Ironstone Host Rock. The Opal Seam Is Visible Along One Face Of The Specimen, Showing Blue And Green Play-Of-Colour With Areas Of White And Pale Blue Potch. The Ironstone Matrix Is A Characteristic Ochre-Brown Colour With A Darker Brown Weathered Surface On The Opal-Bearing Face.

Opal Specification
* Type: Solid Boulder Opal In Ironstone Matrix (Rough, Uncut Specimen)
* Body Tone: N5 (Estimated)
* Brightness: 3 (Estimated)
* Pattern: Broad Flash
* Dominant Play-Of-Colour: Blue And Green, With Minor Violet Flashes
* Crazing: None Visible

Condition Notes
The Specimen Is In Its Natural Rough State. The Opal Seam Runs Vertically Along One Face Of The Ironstone Host, Extending The Length Of The Specimen. The Opal Surface Shows Areas Of Bright Blue And Green Colour Play Interspersed With Potch And Ironstone Inclusions. The Reverse And Remaining Faces Are Rough Ironstone With Ochre-Coloured Clay Surface. A Small Red Marking Is Visible On The Upper Right Area Of The Reverse Face. The Specimen Sits On A Flat Base.
SOUTH AUSTRALIA
658431+24

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