1. The Crystal hanging from the rear view of my parents' Chrysler New Yorker Fifth Avenue
  2. Crystal from Roseanne
  3. Crystal Pepsi
  4. Crystal Bernard
  5. Crystal hot sauce
  6. Crystal Castles (the game)
  7. Grow-Your-Own-Crystal kits from museum gift shops.
  8. The Dark Crystal
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    Suggested by @lindsinger