“Sphalerite crystals on dolomite. This from a series of pieces with the generic (dealer?) label "Gummersbach". 5MP Chinese unbranded CMOS camera with bellows and FYSCOPE 4X Plan Achromatic Objective Lens. Processed with Zerene stacker DMap and post stacking cleanup with Faststone. Collection and photograph of Rod Martin. ”

“Embayed feldspar crystal with sphalerite on dolomite. This from a series of pieces with the generic (dealer?) label "Gummersbach". 5MP Chinese unbranded CMOS camera with bellows and FYSCOPE 4X Plan Achromatic Objective Lens. Processed with Zerene stacker DMap and post stacking cleanup with Faststone. Collection and photograph of Rod Martin. ”