Botryoidal blue OPAL coating a broken QUARTZ crystal
Collected from the "Blue Puss" Pocket,
Denny Mountain Skarn, near North Bend, King County, Washington, USA

Specimen is ~5 cm (longest dimension)
John Lindell Collection. Collected by John Lindell on June 11, 1983

Photo Copyright © 2017 Jeffrey M. Schwartz
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