Caryopilite
![](/Images/godic/202501/10/Caryopilite-Rhodochrosite-896345301.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.