Messelite: properties and Occurrences
Messelite is a mineral with formula Ca2(Fe2+, Mn2+)(PO4)2·2H2O. It is a triclinic-pinacoidal mineral containing calcium, hydrogen, iron, manganese, oxygen, and phosphorus. It was discovered in Germany…
Geographic Minerals
Tetrahedrite
Tetrahedrite is composed of two-component minerals: tetrahedrite, the end member rich in antimony, and tennantite, the end member rich in arsenic. It is a mineral…
Enargite
Enargite, mineral sulfosalt, copper arsenic sulfide (Cu3AsS4), which is sometimes a significant copper ore. Enargite is named in reference to its distinctive flawless cleavage, for…
Mesolite: Properties and Occurrences
Mesolite is a mineral of the zeolite family, similar to natrolite. It is a fragile member of the zeolite group and forms almost exclusively in delicate, needle-like crystal…
Merrillite: Properties and Occurrences
Merrillite is a calcium phosphate mineral with the chemical formula Ca9NaMg(PO4)7. It is a calcium phosphate mineral found in some meteorites. It is an anhydrous,…
Cassiterite – a Tin Oxide Mineral
Cassiterite is a reddish, brownish, or yellowish mineral consisting of tin dioxide. It is the most important source of tin, and most of the world’s…
Meridianiite: Properties and Occurrences
Meridianiite is the mineral consisting of magnesium sulfate undecahydrate, MgSO4•11H2O. These minerals can form by precipitation from a saturated solution or through evaporation of a brine solution at or below the…
Merenskyite: Properties and Occurrences
Merenskyite is a rare telluride / bismuthinide mineral with formula: (Pd, Pt)(Te, Bi)2. It is a trigonal-ditrigonal pyramidal white mineral containing bismuth, palladium, platinum, and…
Mereheadite: Properties and Occurrences
Mereheadite is a monoclinic-prismatic mineral containing chlorine, hydrogen, lead, and oxygen. It is a rare oxychloride that can be found with Mendipite at Merehead Quarry,…
Meneghinite: Properties and Occurrences
Meneghinite is a rare mineral that generally forms interesting acicular crystals. It is a sulfosalt mineral with the chemical formula CuPb13 Sb7S24. It is a mineral consisting…
Mendozite: Properties and Occurrences
Mendozite is a sulfate mineral, one of the alum series, with formula NaAl (SO4)2·11H2O. It is a mineral consisting of a monoclinic hydrous sulfate of…
Mendipite: Properties and Occurrences
Mendipite is an orthorhombic-disphenoidal mineral containing chlorine, lead, and oxygen. It is a rare mineral that was named in 1939 for the locality where it…
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