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.…
Geographic Minerals
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…
Dyscrasite
Dyscrasite is a silver antimonide mineral that was first described in 1797 in the Wenzel Mine, Black Forest, Germany. The silver antimonide mineral dyscrasite has…
Dypingite: Properties and Occurrence
Dypingite is a hydrated magnesium carbonate mineral with the formula: Mg5(CO3)4(OH)2·5H2O. It is a monoclinic white mineral containing carbon, hydrogen, magnesium, and oxygen. Its type…
Dundasite: Properties and Occurrences
Dundasite is a rare lead aluminum carbonate mineral. It is an orthorhombic-dipyramidal mineral containing aluminum. It is an orthorhombic-dipyramidal mineral containing aluminum, carbon, hydrogen, lead,…
Dumortierite
Dumortierite is a fibrous variably colored aluminum boro-silicate mineral, Al7BO3(SiO)3O3. It is a fibrous aluminum boro-silicate mineral that occurs in various colors. It is a…
Duftite: Properties and Occurrences
Duftite is a relatively common arsenate mineral with the formula CuPb(AsO4)(OH), related to conichalcite. The color of duftite gives it its great note of distinction.…
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