1. 
   Petalite
   Pet'al·ite noun [ Confer French pétalite .] (Min.) A rare mineral, occurring crystallized and in cleavable masses, usually white, or nearly so, in color. It is a silicate of aluminia and lithia.
   Found op http://www.encyclo.co.uk/webster/P/65
   
   
2. 
   petalite
   <chemical> A rare mineral, occurring crystallized and in cleavable masses, usually white, or nearly so, in colour. It is a silicate of aluminia and lithia. ... Origin: Cf. F. Petalite. ... Source: Websters Dictionary ... (01 Mar 1998) ...
   Found op http://www.mondofacto.com/facts/dictionary?petalite
   
   
3. 
   Petalite
   • (n.) A rare mineral, occurring crystallized and in cleavable masses, usually white, or nearly so, in color. It is a silicate of aluminia and lithia.
   Found op http://thinkexist.com/dictionary/meaning/petalite/
   
   
4. 
   Petalite
   Petalite, also known as castorite, is a lithium aluminium tectosilicate mineral LiAlSi4O10, crystallizing in the monoclinic system. Petalite is a member of the feldspathoid group. It occurs as colourless, grey, yellow, yellow grey, to white tabular crystals and columnar masses. Occurs in lithium-be...
   Found op http://en.wikipedia.org/wiki/Petalite
   
   
5. 
   Petalite
   Petalite has the formulae LiAlSi4O10 and a relative hardness of 7. It is an ore of lithium. Associated with spodumene, lepidolite, tourmaline.
   Found op http://www.probertencyclopaedia.com/browse/HP.HTM
   
   

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