Hilgardite: Properties and Occurrences
Hilgardite is a borate mineral with the chemical formula Ca2B5O9Cl·H2O. It is a vitreous mixed borate and chloride mineral calcium. It was named for geologist…
Geographic Minerals
Hidalgoite: Properties and Occurrences
Hidalgoite, PbAl3(AsO4)(SO4)(OH)4, is a rare member of the beudantite group and is usually classified as part of the alunite family. It is a trigonal-hexagonal scalenohedral…
Hibonite: Properties and Occurrences
Hibonite [(Ca, Ce)(Al, Ti, Mg)12O19] is a very rare gem. It is a calcium aluminate mineral found in carbonaceous chondrite meteorites. Stones which are large…
Hiärneite
Hiärneite is an oxide mineral named after the Swedish geologist Urban Hiärne (1641-1727). It is an oxide mineral containing antimony and zirconium. The mineral can…
Hexaferrum
Hexaferrum is a (formula: Fe, Os, Ru, Ir) hexagonal-dihexagonal dipyramidal yellowish steel-gray mineral containing iridium, iron, osmium, and ruthenium. It was named for the crystal…
Heulandite: Properties and Occurrences
Heulandite is the name of a series of tecto-silicate minerals of the zeolite group. This mineral is a zeolite consisting of a hydrous aluminosilicate of…
Hessite: Properties and Occurrences
Hessite is a mineral form of disilver telluride (Ag2Te). It is a mineral consisting of a lead-gray sectile silver telluride often auriferous and usually massive.…
Hermannjahnite
Hermannjahnite is a rare sulfate mineral with the relatively simple formula CuZn(SO4)2. It is one of many fumarolic minerals discovered on the Tolbachik volcano. The…
Herderite: Properties and Occurrences
Herderite is a phosphate mineral belonging to the apatite, phosphate group, with formula CaBe(PO4)(F,OH). It is a mineral consisting of phosphate and fluoride of beryllium…
Hercynite: Properties and Occurrences
Hercynite is a spinel mineral with the formula FeAl2O4. It is an isometric-hexoctahedral black mineral containing aluminum, iron, and oxygen.It forms dark blue-green, yellow, brown…
Herbertsmithite
Herbertsmithite is a mineral with chemical structure ZnCu3(OH)6C12. It is a mineral with light green or blue-green with a vitreous luster. It was discovered in…
Heptasartorite
Heptasartorite is a very rare mineral with formula Tl7Pb22As55S108. It belongs to sartorite homologous series. It is related to other recently approved minerals of the…
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