ludlamite
noun
lud·lam·ite
| \ ˈlədləˌmīt\
plural -s
Definition of ludlamite
: a mineral (Fe,Mg,Mn)3(PO4)2.4H2O that is a hydrous iron phosphate with magnesium and manganese replacing some of the iron and that occurs in small green transparent monoclinic crystals
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