Psilomelane is a group name for hard black manganese oxides including hollandite and romanechite. Psilomelane consists of hydrous manganese oxide with variable amounts of barium and potassium. Psilomelane is erroneously, and uncommonly, known as black hematite, despite not being related to true hematite, which is an iron oxide.

2024年8月8日 · Psilomelane is a barium manganese oxide mineral, typically presenting as black or dark gray with a submetallic to dull luster. It often forms botryoidal or stalactitic masses, making it visually distinctive.

2019年5月11日 · Psilomelane is a powerful cleansing stone that can enhance the body’s filtration and elimination of toxins in the organs. With a restorative quality, Psilomelaneenergies can rebuild the cellular body, as well as the skeletal body. It’s also …

psilomelane, Barium and manganese hydrous oxide, BaMnMn 8 O 16 (OH) 4, an important ore mineral of manganese. What was formerly called psilomelane is now known to be a mixture of several manganese oxides of which romanechite is a major constituent.

From the Greek ψιλός (psilos) "smooth" or "bald", and μέλας (melas) "black" in allusion to the form and colour. Obsolete group name for hard black Manganese Oxides. Compare the obsolete wad. Visit gemdat.org for gemological information about …

Psilomelane describes barium manganese hydroxides that do not form in visible crystals. Originally recognized as an individual mineral species, Psilomelane was discredited by the IMA in 1982.

Psilomelane gemstones are members of the barium manganese oxide group. They are typically opaque, with a rich, velvety black color that absorbs light, giving them a distinctive dark allure and a sub-metallic dull luster.

2023年7月13日 · This chapter describes Psilomelane (abbrv. psi), as seen with optical, reflected light microscopy. After summing up compositional data, main properties and optical parameters, the presentation follows a systematic scheme to facilitate consultation and comparison with...

Psilomelane is a general term grouping together hard manganese oxides, indeterminate in their massive form. Its composition is therefore variable to a large extent, admitting high contents of cobalt, lithium, potassium, calcium or barium, and sometimes tungsten.

Psilomelane is used as a blanket term to denote a variety of hard massive mixtures of manganese oxides. Most, but not all, psilomelane is the mineral romanechite (BaMn 2+ Mn 4+8 O 16 (OH) 4 ).