Goethite

Helen-MacLeod Mines, McMurray and Chabanel Townships, Algoma District, Ontario  Canada

Specimen size: 2.7 × 2.4 × 1.5 cm = 1.06” × 0.94” × 0.59”
Main crystal size: 1.4 × 1.4 cm = 0.55” × 0.55”