We are used to seeing millerite as fine acicular or hair-like crystals, where cleavage would be impossible to observe. In this sample, the millerite is present as coarse cleavages embedded in chalcopyrite and pyrrhotite. Unusual for millerite!
Note: All prices are in Canadian dollars (CAD). International customers are charged in CAD, exchange rate is calculated automatically by your bank/paypal upon checkout.