pyrargyrite
/pʌɪˈrɑːdʒɪrʌɪt
/noun [mass noun]
A dark reddish-grey mineral consisting of a sulphide of silver and antimony.Pseudomorphs of marcasite, chalcopyrite, pyrite, arsenopyrite, pyrargyrite, magnetite, and quartz after pyrrhotite have been reported....
- Hurst describes the vugs as containing gold, silver, polybasite, pyrargyrite, and tetrahedrite.
- The primary ore mineral was pyrargyrite, and much of the ore ran 500-5,000 ounces of silver per ton.
Origin
Mid 19th century: from Greek puro- (from pur 'fire') + arguros 'silver' + -ite1.
- letter opener
- letter ornament
- letter paper
- letter-perfect
- letter plant
- letter plate
- letter post
- letterpress
- letter punch
- letter-quality
- letter rack
- letter receiver
- letter recommendatory
- letter-scale
- letterset
- letter slot
- letters missive
- letters of administration
- letter space
- letters page
- letters patent
- letters rogatory
- letter stamp
- letters testamentary
- letter stick