from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A mineral form of silver sulfide, Ag2S, that is a major ore of silver, that forms slender prisms.

from The Century Dictionary and Cyclopedia

  • n. A mineral, a sulphid of silver having the same composition as argentite, but differing in crystalline form: found at Freiberg, Saxony.


Named in 1855, from the Greek ἄκανθα (akantha) "thorn", because of the crystal shapes.[2] (Wiktionary)


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