Epidote: Properties and Occurrences
Epidote is a calcium aluminum iron sorosilicate mineral. The color is green, grey, brown or nearly black, but usually a characteristic shade of yellowish-green or…
Science
Ephesite: Properties and Occurrence
Ephesite is a rare member of the mica silicate mineral group, phyllosilicate. It is a monoclinic-prismatic mineral containing aluminum, hydrogen, lithium, oxygen, silicon, and sodium.…
Eosphorite: Properties and Occuurrence
Eosphorite is a brown (occasionally pink) manganese hydrous phosphate mineral with chemical formula: MnAl(PO4)(OH)2·H2O. It is used as a gemstone. It is an orthorhombic-dipyramidal mineral…
Enstatite: Properties and Occurrences
Enstatite is a mineral; the magnesium endmember of the pyroxene silicate mineral series enstatite (MgSiO3) – ferrosilite (FeSiO3). It is a translucent crystalline mineral that…
Enargite: Properties and Occurrences
Enargite is a copper arsenic sulfosalt mineral with formula: Cu3AsS4. It is a dark grey mineral consisting of a sulfide of copper and arsenic. It…
Emmonsite
Emmonsite, also known as durdenite, is an iron tellurite mineral with the formula: Fe2(TeO3)3·2(H2O). It is a triclinic-pinacoidal mineral containing hydrogen, iron, oxygen, and tellurium.…
Empressite
Empressite is a mineral form of silver telluride, AgTe. It is a rare, grey, orthorhombic mineral with which can form compact masses, rarely as bipyrimidal…
Elbaite: Properties and Occurrences
Elbaite, a sodium, lithium, aluminum boro-silicate, with the chemical composition Na(Li1.5Al1.5)Al6Si6O18(BO3)3(OH)4, is a mineral species belonging to the six-member ring cyclosilicate tourmaline group. It is…
Efremovite
Efremovite is a rare ammonium sulfate mineral with the chemical formula: (NH4)2Mg2(SO4)3. It is an isometric-tetartoidal mineral containing hydrogen, magnesium, nitrogen, oxygen, and sulfur. It…
Edingtonite: Properties and Occurrences
Edingtonite is a white, gray, brown, colorless, pink or yellow zeolite mineral. Its chemical formula is BaAl2Si3O10·4H2O. It is a grayish-white zeolitic mineral, in tetragonal…
Edenite: Properties and Occurrences
Edenite is a double chain silicate mineral of the amphibole group with the general chemical composition NaCa2Mg5(Si7Al)O22(OH)2. It is a monoclinic-prismatic mineral containing aluminum, calcium,…
Dzhalindite
Dzhalindite is a rare indium hydroxide mineral discovered in Siberia. Its chemical formula is In(OH)3. It is an isometric-diploidal yellow-brown mineral containing hydrogen, indium, and…
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