Geographic Minerals

Germanite is a rare copper iron germanium sulfide mineral, Cu26Fe4Ge4S32. It was first discovered in 1922, and named for its germanium content. It is a…

Georgerobinsonite, named for George Willard Robinson, is a lead chromate mineral with formula Pb4(CrO4)2(OH)2FCl. The type specimen for georgerobinsonite was found in the Mammoth-St. Anthony…

Geocronite is a mineral, a mixed sulfosalt containing lead, antimony, and arsenic with a formula of Pb14(Sb, As)6S23. It is a mineral consisting of a…

Geikielite is a magnesium titanium oxide mineral with formula: MgTiO3. It is a member of the ilmenite group. It is a mineral consisting of magnesium…

Geigerite is a mineral, a complex hydrous manganese arsenate with the formula: Mn5(AsO3OH)2(AsO4)2·10H2O. It is a triclinic-pinacoidal mineral containing arsenic, hydrogen, manganese, and oxygen. It…

Gehlenite, Ca2Al[AlSiO7], is a sorosilicate, Al-rich endmember of the melilite complete solid solution series with akermanite. It is a particular kind of sorosilicate. It is…

Geerite is a copper sulfide mineral with the chemical formula Cu8S5. It is a trigonal bluish white mineral containing copper and sulfur. It has been…

Gedrite is a crystal belonging to the orthorhombic ferromagnesian subgroup of the amphibole supergroup of the double chain inosilicate minerals with the ideal formula: Mg2(Mg3Al)(Si6Al2)O22(OH)2.…

Gaylussite is a carbonate mineral, a hydrated sodium calcium carbonate, formula Na2Ca(CO3)2·5H2O. It is named for French chemist and physicist J. L. Gay-lussac. It is…

Gatehouseite is a manganese hydroxy-phosphate mineral with formula Mn5(PO4)2(OH)4. It is a mineral containing hydrogen, manganese, oxygen, and phosphorus. First discovered in 1987, it was…

Gaspéite, a very rare nickel carbonate mineral, with the formula (Ni, Fe, Mg)CO3, is named for the place it was first described, in the Gaspé…

Garnets are a group of silicate minerals that have been used since the Bronze Age as gemstones and abrasives. It is a precious stone consisting…