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3 definitions found
 for Brittle silver ore
From The Collaborative International Dictionary of English v.0.48 :

  Silver \Sil"ver\ (s[i^]l"v[~e]r), n. [OE. silver, selver,
     seolver, AS. seolfor, siolfur, siolufr, silofr, sylofr; akin
     to OS. silubar, OFries. selover, D. zilver, LG. sulver, OHG.
     silabar, silbar, G. silber, Icel. silfr, Sw. silfver, Dan.
     s["o]lv, Goth. silubr, Russ. serebro, Lith. sidabras; of
     unknown origin.]
     1. (Chem.) A soft white metallic element, sonorous, ductile,
        very malleable, and capable of a high degree of polish. It
        is found native, and also combined with sulphur, arsenic,
        antimony, chlorine, etc., in the minerals argentite,
        proustite, pyrargyrite, ceragyrite, etc. Silver is one of
        the "noble" metals, so-called, not being easily oxidized,
        and is used for coin, jewelry, plate, and a great variety
        of articles. Symbol Ag (Argentum). Atomic weight 107.7.
        Specific gravity 10.5.
        [1913 Webster]
  
     Note: Silver was known under the name of luna to the ancients
           and also to the alchemists. Some of its compounds, as
           the halogen salts, are remarkable for the effect of
           light upon them, and are used in photography.
           [1913 Webster]
  
     2. Coin made of silver; silver money.
        [1913 Webster]
  
     3. Anything having the luster or appearance of silver.
        [1913 Webster]
  
     4. The color of silver.
        [1913 Webster]
  
     Note: Silver is used in the formation of many compounds of
           obvious meaning; as, silver-armed, silver-bright,
           silver-buskined, silver-coated, silver-footed,
           silver-haired, silver-headed, silver-mantled,
           silver-plated, silver-slippered, silver-sounding,
           silver-studded, silver-tongued, silver-white. See
           Silver, a.
           [1913 Webster]
  
     Black silver (Min.), stephanite; -- called also brittle
        silver ore, or brittle silver glance.
  
     Fulminating silver. (Chem.)
        (a) A black crystalline substance, Ag2O.(NH3)2, obtained
            by dissolving silver oxide in aqua ammonia. When dry
            it explodes violently on the slightest percussion.
        (b) Silver fulminate, a white crystalline substance,
            Ag2C2N2O2, obtained by adding alcohol to a solution
            of silver nitrate; -- also called fulminate of
            silver. When dry it is violently explosive.
  
     German silver. (Chem.) See under German.
  
     Gray silver. (Min.) See Freieslebenite.
  
     Horn silver. (Min.) See Cerargyrite.
  
     King's silver. (O. Eng. Law) See Postfine.
  
     Red silver, or Ruby silver. (Min.) See Proustite, and
        Pyrargyrite.
  
     Silver beater, one who beats silver into silver leaf or
        silver foil.
  
     Silver glance, or Vitreous silver. (Min.) See
        Argentine.
        [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 :

  Stephanite \Steph"an*ite\, n. [So named after the Archduke
     Stephan, mining director of Austria.] (Min.)
     A sulphide of antimony and silver of an iron-black color and
     metallic luster; called also black silver, and brittle
     silver ore.
     [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 :

  Brittle \Brit"tle\, a. [OE. britel, brutel, AS. bryttian to
     dispense, fr. bre['o]tan to break; akin to Icel. brytja, Sw.
     bryta, Dan. bryde. Cf. Brickle.]
     Easily broken; apt to break; fragile; not tough or tenacious.
     [1913 Webster]
  
           Farewell, thou pretty, brittle piece
           Of fine-cut crystal.                     --Cotton.
     [1913 Webster]
  
     Brittle silver ore, the mineral stephanite.
        [1913 Webster]

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