- Small Cabinet, 7.9 x 3.5 x 1.7 cm
- Ross Hannibal Mine (North Star Mine; Hannibal Mine; and Mikado Mine), Lead District, Lawrence Co., South Dakota, USA
Sincosite is an ULTRA RARE calcium vanadium phosphate. This superb, rich specimen has LARGE, tabular grass-green crystals to 3 mm aesthetically strewn across the matrix. The mine is now closed and this specimen was mined in the early 1990s. Ex. Tom and Melissa Campbell Collection.