Garnet – Rhodonite

Scientific Name: Manganese silicate

Group: Silicates – inosilicates

Chemical composition: (mn,Ca)5(Si5O15)

Colors: Pink to rose-red

Hardness: 6

Formation: Triclinic crystal; tabular form; perfect cleavage; conchoidal to uneven fracture; vitreous luster; translucent

Principal Sources: Brazil; Canada; Sweden; Russia; England; USA

Special Notes: Medium-grade rhodonite is a popular material for tumble-polishing, and is widely sold.