ludlamite
noun
lud·lam·ite
ˈlədləˌmīt
plural -s
: 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
Word History
Etymology
Henry Ludlam †1880 English mineralogist + English -ite