- The Gold Rush (Wikipedia)
The Gold Rush is a 1925 American silent comedy film written, produced, and directed by Charlie Chaplin. The film also stars Chaplin in his Little Tramp persona, Georgia Hale, Mack Swain, Tom Murray, Henry Bergman and Malcolm Waite.
- Quartz (Wikipedia)
Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2. Quartz is the second most abundant mineral in Earth’s continental crust, behind feldspar.