This is an old-time, classic specimen of lustrous, silvery-gray Acanthite crystals on a matrix that is almost 100% Acanthite! The two isolated crystals are subhedral and the largest crystal measures a substantial 3.4 cm in length! The remainder of this very rich Silver Sulfide is mostly massive Acanthite matrix, with some crystalline development. This area was discovered in 1900 and was mined for Silver and Radium. It has been mined on and off since then, and is now closed. This is a significant Canadian Acanthite. It is also a very hefty, big piece, at 692 grams. I have not seen such a massive large specimen from this old locality, with any reliable provenance, outside of museums.