Aksum manufactured glass crystal, brass, and copper for export. New materials were used in art, such as amber, crystal, and jasper. MBBA is a common formula 34 liquid crystal. This is the basis of the optical band gap in a photonic crystal. Soap is an everyday example of a lyotropic liquid crystal. Clathrate hydrates are forms of ice that contain gas molecules trapped within its crystal lattice. This makes the color of the crystal become dull. Bragg diffraction is a consequence of interference between waves reflecting from different crystal planes. The manufacture of a perfect crystal of a material is physically impossible. Piezoelectric resonators are sold as separate components for use in crystal oscillator circuits. The story revolves around four orphaned youths drawn to a crystal of light. The relationship is dependent on the crystal structure. The series depicts various paranormal phenomena occurring at Crystal Lake. This is in contrast to ordinary freezing which results in ice crystal formation. For a visualization of the crystal structures see.