the world > the earth > minerals > types of mineral > silicates > nesosilicates > [noun] > olivine group > humite or norbergerite (2)
A fluo-silicate of magnesium, long considered a variety of chondrodite, but now, on crystallographical grounds, made a distinct species.
An orthorhombic basic silicate and fluoride of magnesium, Mg3SiO4(F,OH)2, which is a member of the humite group and occurs as pink or whitish…