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Penikisite: BaMg2Al2(PO4)3(OH)3 Jagowerite: BaAl2(PO4)2(OH)2
Comments: Light green crystal of jagowerite intergrown with darker green penikisite in a tetrahedrite (black) and white quartz matrix. Location: From quartz veins cutting clays 26 km N of Hess River, Yukon Territory, Canada. Scale: Sample size 2x1 cm. © Dave Barthelmy