1. Dark red silver ore; it is a sulphide of antimony and silver, occurring in rhombohedral crystals or massive, and is of a dark red or black colour with a metallic adamantine lustre
   - pyrargyrite 
2. A sulphide of arsenic and silver of a beautiful cochineal-red colour, occurring in rhombohedral crystals, and also massive
   - proustite

Derived forms: ruby silvers

• weigh on
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