An industrial metal, manganese is widely used to render desirable properties to steel such as strength and resistance to corrosion. However, it is much less commonly reduced to a pure state as it's also finicky to work with in this form. In particular, at high temperatures the metal is notoriously sensitive to oxidation. The very slightest trace of oxygen can spoil acres of its surface making for especially difficult procedures if one were to seek pristine surfaces.
These electrolytically purified manganese chips feature a mottled side ridden with bumps and a smooth near-oxide free side providing an interesting contrast for the collector.