What is another word for cryptomelane?
Pronunciation: [kɹˈɪptə͡ʊmlˌe͡ɪn] (IPA) 
Cryptomelane is a type of mineral that belongs to the potassium-manganese oxide family. It is commonly found in small amounts in various minerals and rocks, including sandstones, shales, and clays. This mineral is characterized by its black or dark grey color, fine-grain texture, and high resistance to weathering and erosion.
Several other terms are occasionally used as synonyms for cryptomelane, including black oxide of manganese, hollandite, and psilomelane. These terms refer to substances that share similar properties and characteristics with cryptomelane, such as their mineral composition, physical appearance, and geologic origins. While they are not interchangeable, they can be used to provide additional context or information about the mineral.
