Alternative spelling of crystal clear

plural of single crystal

(pseudoscience) The supposed therapeutic effects of crystals.

(physics) A specific vector associated with the movement of electrons in a crystal lattice

(dated) potassium permanganate

clear, colourless form of the silica-based mineral quartz, often called "pure quartz" or "clear quartz".

plural of crystal lattice

plural of liquid crystal

(optics) A uniaxial crystal, such as one of calcite, in which the extraordinary wave travels faster than the ordinary wave / A crystal that contains a cavity

(mineralogy) A mineral crystal whose interior space is empty