1. 
   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 op http://www.keystothepast.info/durhamcc/k2p.nsf/k2pGlossaryList?readform&let
   
   
2. 
   Ganister
   • (n.) Alt. of Gannister
   Found op http://thinkexist.com/dictionary/meaning/ganister/
   
   
3. 
   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,...
   Found op http://en.wikipedia.org/wiki/Ganister
   
   
4. 
   ganister
   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 op http://www2.shu.ac.uk/sfca/glossary.cfm
   
   

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