Neptunite (mineral)
Neptunite crystals, a selection of specimens of this crystallized mineral species. Neptunite is a mineral, here many pieces of collection presented with a description, one or more photos and sometimes a video. These neptunites are for sale.
It is a silicate, subgroup of inosilicate, with chemical formula KNa2Li(Fe2+,Mn)2Ti2Si8O24, and monoclinic crystal system.
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