The Collaborative International Dictionary of English v.0.48:

Smoky \Smok"y\, a. [Compar. Smokier; superl. Smokiest.]
   1. Emitting smoke, esp. in large quantities or in an
      offensive manner; fumid; as, smoky fires.
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   2. Having the appearance or nature of smoke; as, a smoky fog.
      "Unlustrous as the smoky light." --Shak.
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   3. Filled with smoke, or with a vapor resembling smoke;
      thick; as, a smoky atmosphere.
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   4. Subject to be filled with smoke from chimneys or
      fireplace; as, a smoky house.
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   5. Tarnished with smoke; noisome with smoke; as, smoky
      rafters; smoky cells.
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   6. Suspicious; open to suspicion. [Obs.] --Foote.
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   Smoky quartz (Min.), a variety of quartz crystal of a pale
      to dark smoky-brown color. See Quartz.
      [1913 Webster] Smolder

WordNet (r) 3.0 (2006):

smoky quartz
    n 1: a smoky yellow or brown quartz [syn: cairngorm, smoky
         quartz]