Caryopilite
![](/Images/godic/202501/03/Caryopilite-Rhodochrosite-896345243.jpg")
Caryopilite (synonymous with ectropite and ektropite) is a brown-colored mineral with formula (Mn,Mg)3Si2O5(OH)4. The mineral was discovered in 1889 from a mine in Sweden. It was named for the Greek words for walnut and felt in reference to its appearance.