  Green plant.   
Green plants are green because they contain chlorophyll, which they use for photosynthesis.  Chlorophyll contains a magnesium ion in its active center. 
Source: Nick Mann 
Contributor: Nick Mann 
Acquired: 13 January, 2010 
Text Updated: 13 January, 2010 
Price: Donated 
Size: 2" 
Purity: <1%
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