- Silver, Proustite
- Large Cabinet, 19.2 x 11.7 x 2.6 cm
- Castle Mine (Castle-Trethwey Mine), Haultain Township, Gowganda area, Cobalt-Gowganda region, Timiskaming District, Ontario, Canada
A sculptural, slabbed and polished, large cabinet specimen of extremely rich, massive silver ore from the Cobalt-Gowganda Region of Ontario. The matrix is greenstone. The back and sides of this impressive ore specimen are very richly coated with red proustite. Weighs 2.4 pounds or just over a kilogram.