- A homogenous solid formed by a repeating, three-dimensional pattern of atoms, ions, or molecules and having fixed distances between constituent parts.
- The unit cell of such a pattern.
- A mineral, especially a transparent form of quartz, having a crystalline structure, often characterized by external planar faces.
Crystal trees (actually hand blown glass) illuminated in the window of the Simon Pierce Gallery in Quechee.
Tomorrow's randomly generated word: Mainstream