From lake bed off Keweenaw Point

7.8 cm x 4.2 cm

Caledonia Mine

14 cm x 8.4 cm

Delaware Mine

12.4 cm x 9.6 cm

From Centennial #2 Mine

9.8 cm x 2.8 cm

From lake bed off Keweenaw Point

3.2 cm x 1.9 cm

Mandan Mine

9.2 cm x 4.8 cm

Mesnard Mine

12.6 cm x 9.8 cm