Both rhodonite and manganese oxides occur in these layers.
Consists of manganese oxides-hydroxides and rhodonite in quartzite.
rhodonite has long be used for decorative beads and other ornaments because of its pink color.
British Dictionary definitions for rhodonite
a brownish translucent mineral consisting of manganese silicate in triclinic crystalline form with calcium, iron, or magnesium sometimes replacing the manganese. It occurs in metamorphic rocks, esp in New Jersey and Russia, and is used as an ornamental stone, glaze, and pigment. Formula: MnSiO3
C19: from German Rhodonit, from Greek rhodon rose + -ite