Acanthite

Acanthite is a mineral that can be lead gray, gray, or coal in color and is made from crystals. Its name comes from the Greek word, akanta, meaning "arrow", or the Latin word argentum, meaning "silver". It is made of silver(I) sulfide.

Acanthite crystals from the Imiter Mine, Morocco.

It is found in Freiberg, Schneeberg, and Annaberg, Germany. Acanthite is not radioactive.[1]

References

"Mineral Data Sheet". Archived from the original on 2012-05-01. Retrieved 2007-11-29.{{cite web}}: CS1 maint: bot: original URL status unknown (link)

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[1] "Mineral Data Sheet". Archived from the original on 2012-05-01. Retrieved 2007-11-29.{{cite web}}: CS1 maint: bot: original URL status unknown (link)