Magnetite     Marmora Quarry, Marmora, Ontario, Canada.  Collected by Michael Walter.  This is the nicest example of this unusual material that I have found and the nicest I have seen.  The blades, tabular crystals, are up to 1.5 cm wide and exhibit good coverage on this 9 x 6.2 x 3.3 cm plate.  The crystals are quite unusual for magnetite.  No damage.  $150