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Sincosite: Ca(V++++O)2(PO4)2·5(H2O) Minyulite: KAl2(PO4)2(OH,F)·4(H2O)
Comments: Pale greenish white acicular radial sprays of minyulite to 8mm with small, green, tabular sincosite. Location: Ross Hannibal mine, Lawrence County, South Dakota. Scale: Picture size 2 cm. © Tom Loomis / Dakota Matrix
Sincosite: Ca(V++++O)2(PO4)2·5(H2O)
Comments: Tabular single crystals of sincosite to 2 mm on drusy quartz. Location: Ross Hannibal Mine, Lawrence Co., South Dakota, USA. Scale: Picture size 1.5 cm. © Tom Loomis / Dakota Matrix