- Small Cabinet, 6.0 x 4.0 x 3.5 cm
- Robert Mine (Roberts Mine; Kennedy Mine), Cuyuna Range, Crow Wing Co., Minnesota, USA
Two connected clusters of super-lustrous and sharp, jet-black groutite crystals richly cover a sculptural arrowhead-like matrix of hematite with a bit of quartz from a mine near the Minnesota type locality. This is a very fine specimen of the species from a famous lucky strike in the 1980s. Rare on the market! The rosette is very showy.