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CRYSTALS
- CRYSTAL, a transparent mineral [n]
- A piece of a homogeneous solid substance having a natural geometrically regular form with symmetrically arranged plane faces
- Any solid consisting of a symmetrical, ordered, three-dimensional aggregation of atoms or molecules
- A crystalline piece of semiconductor used as an oscillator or transducer
- A clear transparent mineral, esp. quartz
- A piece of crystalline substance believed to have healing powers
- Highly transparent glass with a high refractive index
- Articles made of such glass
- The glass over a watch face