ax·i·nite
| \ ˈaksəˌnīt \
plural -s
Definition of axinite
: a mineral Ca2(MnFe)Al2BSi4O15OH, consisting of borosilicate of aluminum and calcium with varying amounts of iron and manganese commonly in brown glassy sharp-edged triclinic crystals (hardness 6.5–7, specific gravity 3.27–3.29)
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Merriam-Webster unabridged
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