1) Rock used to line furnaces
Found on
https://www.crosswordclues.com/clue/ganister
A ganister is hard, fine-grained quartzose sandstone, or orthoquartzite, used in the manufacture of silica brick typically used to line furnaces. Ganisters are cemented with secondary silica and typically have a characteristic splintery fracture. Cornish miners originally coined this term for hard, chemically and physically inert silica-cemented q...
Found on
http://en.wikipedia.org/wiki/Ganister
flint-like rock used to surface roads
Found on
http://phrontistery.info/g.html
• (n.) Alt. of Gannister
Found on
http://thinkexist.com/dictionary/meaning/ganister/
A very hard rock that is ground to a powder. Fireclay is added to this, and the mixture is applied to make furnace linings that can withstand very high temperatures. Some was mined near Bowes, County Durham for the Teeside Ironworks.
Found on
http://www.encyclo.co.uk/local/20766
silicious stone, generally found in the strata above and adjacent to coal seams. It is used for mending roads, and, when ground, to make pots for melting steel.
Found on
http://www2.shu.ac.uk/sfca/glossary.cfm
No exact match found.
