This variety of opal is formed when silica is deposited in fine fractures within a quartzite host rock. When the rock is broken along these opal-filled cracks, the beautifully coloured surfaces are exposed.
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Details
Title: Painted lady' opal
Location: Andamooka, South Australia
Type: Mineral
Rights: Geoscience Australia / CC-BY 4.0
Photographer: Chris Fitzgerald
Museum ID: R23602
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