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 sodium and aluminum. It is a hydrated form of sodium aluminum sulfate (soda alum). It is a sulfate mineral of the alum series; a hydrated form of .....
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 is found, the Mendip Hills in Somerset, England. It is an oxyhalide of lead with formula Pb3Cl2O2. This mineral is rare and occurs a.....
Melonite is a nickel telluride mineral. It is a telluride of nickel; it is a metallic mineral. A nickel telluride which occurs in reddish-white granular forms with metallic luster: found in California and also in Colorado. Its chemical formula is NiTe2. It is opaque and white to reddish-white in .....
Petit Granit is a rather compact natural calcareous stone with a natural grey-blue color; it is a Lower Carboniferous (Tournaisian) grey-bluish crinoidal calcareous stone which, when polished, becomes bright black. The rock is also known by different names, such as: Nero Belga, Granit de Flandre,.....
Mellite is a rare and unusual organic gemstone. It forms an association with lignite (brown coal) from compressed decayed plant matter and aluminum. It is also called honeystone, which is an unusual mineral being also an organic chemical. It is composed of Oxygen, Silicon, Manganese, Sodium, Calc.....
Melilite refers to a mineral of the melilite group. It is a mineral consisting of a solid solution of gehlenite and akermanite. It has a yellowish, greenish-brown color. Minerals of the group are solid solutions of several endmembers, the most important of which are gehlenite and åkermanite. T.....
Melanterite is a mineral form of hydrous iron(II) sulfate: FeSO4·7H2O. It is a widespread green, a mostly fibrous mineral composed of hydrated ferrous sulfate. It is the iron analog of the copper sulfate chalcanthite. It is a hydrated iron sulfate formed after the decomposition of pyrite or oth.....
Melanophlogite is a rare silicate mineral and a polymorph of silica (SiO2). It is a rare form of silica, and is in a unique class in that it contains organic compounds in its chemical structure. It has a zeolite-like porous structure which results in relatively low and not well-defined values of.....
Soil is that the uppermost layer of Earth’s crust, formed by the continual weathering of mountains over thousands of years. It’s made from four basic constituents; minerals, organic materials, air, and water. The three main components to blame for its texture are; sand, silt, and clay. Depend.....
Meionite is the calcium-rich end member of the Scapolite series. It is a tectosilicate belonging to the scapolite group with the formula Ca4Al6Si6O24CO3. It is very similar and often indistinguishable from Marialite, the other end member of the series. Some samples may also contain a sulfate grou.....
Mckelveyite-(Y) is hydrated sodium, barium, yttrium, and uranium–containing carbonate mineral, with the chemical formula Ba3Na(Ca, U)Y(CO3)6·3H2O. It was first described in 1965 from deposits in the Green River Formation, Sweetwater County, Wyoming, and is named after Vincent Ellis McK.....
Maskelynite is a glassy material found in some meteorites and meteorite impact craters. It is a type of naturally occurring glass having the composition of a plagioclase series feldspar, created by the vitrification of plagioclase by shock melting in meteorites and meteorite impacts. Typical samp.....