Yellow brucite altering from dark brown periclase, with bright blue botryoidal chrysocolla on a garnet (and more) bearing skarn. Specimen was collected by me at The Old City Quarry (City Quarry; North Hill Quarry; Quarry Hill; Fairmount), Riverside, Riverside County, California, USA. Photos shot on my Canon 70D with Helicon Remote, focus stacked with Helicon Focus, and "developed" in Adobe Lightroom Classic.

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