#SPYR 59:  8.5 x 6 x 1.5 cm (3.35 x 2.4 x 0.6 inches) - $20

Nice specimen featuring a single 2.1 cm (just over 0.8 inch) pyrite cube positioned in the end of a marl matrix base.  I cannot see any nicks or rubs on the pyrite.  Nice piece!  Does need a little assistance for stability to display.