Noun

(wikipedia rhodonite)

(mineralogy)   A manganese inosilicate mineral with some substitution by iron and magnesium, of composition (Mn]]²⁺,Fe,Mg,Ca)Si[[oxygen, O₃.

*{{quote-magazine, date=2012-03

, author=Lee A. Groat , title=Gemstones , volume=100, issue=2, page=128 , magazine=(American Scientist) citation , passage=Although there are dozens of different types of gems, among the best known and most important are […] . (Common gem materials not addressed in this article include amber, amethyst, chalcedony, garnet, lazurite, malachite, opals, peridot, rhodonite , spinel, tourmaline, turquoise and zircon.)}}