- 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.
- Asellus Borealis (stars.astro.illinois.edu)
ASELLUS BOREALIS (Gamma Cancri). The lore of the sky is not monolithic, but cuts amazingly across time and cultures. There is no single set of stories, as witness Cancer, the Crab, one of the dimmer figures of the Zodiac that is sandwiched between Gemini and Leo.