- Hogfather is the 20th Discworld novel by Terry Pratchett, and a 1997 British Fantasy Award nominee. It was first released in 1996 and published by Victor Gollancz. It came in 137th place in The Big Read, a BBC survey of the most loved British books of all time, making it one of fifteen books by Pratchett in the Top 200.
- Chalcedony (Wikipedia)
Chalcedony (/kælˈsɛdəni/ kal-SED-ə-nee, or /ˈkælsəˌdoʊni/ KAL-sə-doh-nee) is a cryptocrystalline form of silica, composed of very fine intergrowths of quartz and moganite. These are both silica minerals, but they differ in that quartz has a trigonal crystal structure, while moganite is monoclinic. Chalcedony’s standard chemical structure (based on the chemical structure of quartz) is SiO2 (silicon dioxide).