Boulder Opal Rough Specimen - Natural Opal In Ironstone Host Rock

Overview
A Substantial Boulder Opal Rough Specimen Featuring Multiple Seams And Windows Of Natural Opal Visible Through The Ironstone Host Rock. The Opal Displays A Predominantly Blue And Violet Play-Of-Colour Across Several Exposed Faces, With Broad Flash Patterning Visible In The Larger Opal Windows. A Red Marking Is Visible On One Face Of The Ironstone. The Specimen Is Uncut And Unpolished, Presented As A Raw Rough Piece.

Opal Specification
Type: Solid (Boulder Opal In Natural Ironstone Matrix)
Body Tone: N7 (Estimated)
Brightness: 3 (Estimated)
Pattern: Broad Flash
Dominant Play-Of-Colour: Blue And Violet, With Hints Of Purple
Weight: Not Weighed
Crazing: None Visible

Condition
The Specimen Is In Its Natural Rough State. Multiple Opal Seams Are Exposed Across Several Faces Of The Ironstone Host Rock. The Largest Opal Window On The Top Face Shows A Broad Area Of Blue-Violet Opal With A Smooth, Glassy Surface. Additional Smaller Opal Windows And Seams Are Visible On The Sides And Underside Of The Specimen. The Ironstone Matrix Is Intact With Natural Fracture Surfaces Throughout. A Red Painted Or Inked Marking Is Present On One Face Of The Ironstone.
SOUTH AUSTRALIA
658431+23

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