Another Canadian rarity, a rich and heavy (polished) specimen of nickeline (nickel arsenide) from the cobalt district of Canada. According to Mindat, the name came "From the German nickname for the ore miners called kupfernickel (copper nickel); after Old Nick and his mischievous gnomes, because the ore seemed to contain copper but yielded none.") This hefty polished slab weighs 2.8 ounces despite its thin size! HEAVY stuff! This is old material from a classic, now defunct, locality.