Allargentum is a natural, variable alloy of Silver and Antimony that forms crude crystals some of which are present on this specimen. It is likely the majority of this specimen is composed of Allargentum but much of one side is covered with micro crystals which are like native Arsenic.
Condition: Fairly Good
Flaws: About a 1/3 of one side of the specimens is flat possibly due to the application of a chisel or some other mechanical process.
This mineral is also found in the following galleries: Minerals From Europe | Gold and Silver | Elements | Rare Minerals | Minerals Priced Between 100 and 199 Dollars