The main showing on the Jewel Crown grant claim is a galena-bearing vein of calcite and siderite in grey fine-grained mica schist and calcareous mica schist with grey marble lenses. The vein strikes 290 to 300 degrees and dips 70 degrees to the south and is about 1 metre thick at the widest place. It has been followed for about 60 metres in an adit from which small amounts of ore have been mined. Other similar veins are reported near the shore of Kootenay lake, east of the vein.

In 1937, 24 tonnes of ore was mined from which 6221 grams of silver and 6855 kilograms of lead were recovered.