[1] : WordNet (r) 2.0

precious stone
     n : a precious or semiprecious stone incorporated into a piece
         of jewelry syn: jewel, gem
see also:
jewel gem 

[2] : Moby Thesaurus II by Grady Ward, 1.0

36 moby thesaurus words for "precious stone":
   anklet, armlet, bangle, beads, bijou, bracelet, breastpin, brooch,
   chain, chaplet, charm, chatelaine, circle, coronet, crown, crystal,
   diadem, earring, fob, gem, gem stone, jewel, locket, necklace,
   nose ring, pin, rhinestone, ring, semiprecious stone, stickpin,
   stone, tiara, torque, wampum, wristband, wristlet

Blarney Stone >> B Words
Blarney Stone, definition of term: Blarney Stone
blarney+stone_pag1.html

Big Stone Gap >> B Words
Big Stone Gap, definition of term: Big Stone Gap
big+stone+gap_pag1.html