Argentite

Info: From chemical view argentite is clear form of silver sulfide. Sometimes it can contain selenium. Crystals of argentite are usually irregulary shaped. Argentite has lead grey or black colour. Argentite can be created only in temperature more than 173 degrees by celsium, in lower temperature the crystals of argentite begin to desintegrate to akantite.

Found: Interesting speciments were found in Mexico, Chille, Canada and USA.

Used for: Usually grows together with galenite, then it has the importance for silver extraction.

Crystal structure
Cubical
Hardness
2 - 2,5
Colour
From grey to black
Shine
Metalic