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Pabstite: Ba(Sn,Ti)Si3O9
Comments: Pabstite grains in matrix. It is essentially the tin analog of benitoite with tin replacing titanium in the formula 3:1. Pabstite fluoresces under SW UV light as seen in the photo. Location: Kalkar Quarry, Santa Cruz County, California, USA. Scale: 4.5 x 3 cm. © John Veevaert