ncat JR3 Benitoite, Neptunite, California State Gem Mine, Santa Rita Peak, San Benito County, California, USA

Two joined benitoite crystals (I hesitate to say twinned as I don’t know what sorts of twins can occur), shown in normal, longwave ultraviolet (red), and shortwave ultraviolet (blue). It is really interesting how different the surface textures look under each light source. Width of view 14.5mm.

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