A highly sought-after formation of precious opal that takes the shape of a spiky, radiating cluster resembling a pineapple. These are pseudomorphs, meaning the silica gel that formed the opal filled a cavity left by a dissolving crystal cluster, typically ikaite or glauberite. They are almost exclusively found in the White Cliffs opal fields of Australia and are prized by collectors for their unique morphology.
Heard on the job
He pulled a perfectly intact pineapple opal out of the dirt wall, flashing bright green and red fire across every spike.
Also heard as
- opal pineapple