“Modified by CombineZP This photo consists of 38 exposures at progressive focus increments of 25 microns. Image depth of field is approximately 0.9 mm. Camera: Nikon D90 body on a Zeiss Standard microscope frame. Objective: Leitz P 5.6x/0.15na with an Olympus NFK 2.5x projective ocular. Purchased micromount specimen identified by seller. Method of identification is unknown. pyrrohotite on norbergite matrix”