hor·ton·o·lite
| \ hȯ(r)ˈtänᵊlˌīt, ˈhȯ(r)tᵊn- \
plural -s
Definition of hortonolite
: a mineral (Fe,Mg,Mn)2SiO4 of the olivine series consisting of a dark silicate of iron, magnesium, and manganese
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Merriam-Webster unabridged
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