1. 
   Jeffersonite
   Jef'fer·son·ite noun [ Named after Thomas Jefferson .] (Min.) A variety of pyroxene of olive-green color passing into brown. It contains zinc.
   Found op http://www.encyclo.co.uk/webster/J/6
   
   
2. 
   jeffersonite
   <chemical> A variety of pyroxene of olive-green colour passing into brown. It contains zinc. ... Origin: Named after Thomas Jefferson. ... Source: Websters Dictionary ... (01 Mar 1998) ...
   Found op http://www.mondofacto.com/facts/dictionary?jeffersonite
   
   
3. 
   Jeffersonite
   • (n.) A variety of pyroxene of olive-green color passing into brown. It contains zinc.
   Found op http://thinkexist.com/dictionary/meaning/jeffersonite/
   
   
4. 
   Jeffersonite
   Jeffersonite is a dark green pyroxene mineral, a manganese zinc enriched variety of augite (Ca(Mn,Zn,Fe)Si2O6), sometimes compared to aegirine. Jeffersonite is not a recognized mineral name. It occurs in pegmatites where it can form crystals up to 30 cm long and in the contact metamorphic zone betw...
   Found op http://en.wikipedia.org/wiki/Jeffersonite
   
   
5. 
   Jeffersonite
   Jeffersonite, named after Thomas Jefferson, is a variety of pyroxene of olive-green colour passing into brown. It contains zinc.
   Found op http://www.probertencyclopaedia.com/browse/HJ.HTM
   
   

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