1. 
   Ironstone
   I'ron·stone` noun A hard, earthy ore of iron. Clay ironstone . See under Clay . -- Ironstone china , a hard white pottery, first made in England during the 18th century.
   Found op http://www.encyclo.co.uk/webster/I/96
   
   
2. 
   Ironstone
   • (n.) A hard, earthy ore of iron.
   Found op http://thinkexist.com/dictionary/meaning/ironstone/
   
   
3. 
   ironstone
   (from the article `sedimentary rock`) ...extensive, locally thick sequences composed of alternating thin (millimetre to centimetre thick) layers of mainly crystalline-textured iron-rich ...
   Found op http://www.britannica.com/eb/a-z/i/40
   
   
4. 
   Ironstone
   Ironstone is a sedimentary rock, either deposited directly as a ferruginous sediment or created by chemical repacement, that contains a substantial proportion of an iron compound from which iron either can be or once was smelted commercially. This term is customarily restricted to hard coarsely ban...
   Found op http://en.wikipedia.org/wiki/Ironstone
   
   
5. 
   Ironstone
   Ironstone is a rock containing at least fifteen percent iron. Ironstone forms in igneous rocks through mahmatic differentiation - dense heavy minerals such as magnetite crystallise first and sink to the base of the molten magma to form an iron-rich layer. Ironstone also forms in sedimentary rocks su...
   Found op http://www.probertencyclopaedia.com/browse/HI.HTM
   
   
6. 
   Ironstone
   [disambiguation] Ironstone is a type of sedimentary rock. Ironstone may also refer to: ...
   Found op http://en.wikipedia.org/wiki/Ironstone_(disambiguation)
   
   
7. 
   ironstone
   1) Hard white china 2) Hard white pottery
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/ironstone/1
   
   

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