hetaerolite
A tetragonal-ditetragonal dipyramidal black mineral containing manganese, oxygen, and zinc.

heterococcolith
A radial coccolith produced by a heterococcolithophore

heterococcoliths
plural of heterococcolith

heteromorphite
A monoclinic-prismatic black mineral containing antimony, lead, and sulfur.

heterosite
An orthorhombic-dipyramidal mineral containing iron, oxygen, and phosphorus.

heterozite
Alternative form of heterosite.

hewettite
A monoclinic-prismatic red mineral containing calcium, hydrogen, oxygen, and vanadium.

hexacelsian
A hexagonal polymorph of celsian.

hexaferrum
A hexagonal-dihexagonal dipyramidal yellowish steel gray mineral containing iridium, iron, osmium, and ruthenium.
A hexagonal-close-packed allotrope of iron, stable only at high pressure.

hexagonite
Synonym of tremolite.

hexahedrite
A type of iron meteorite composed mostly of kamacite.

hexahedrites
plural of hexahedrite

hexahydroborite
A monoclinic-prismatic mineral containing boron, calcium, hydrogen, and oxygen.

hexamolybdenum
A species of mineral, (Mo,Ru,Fe,Ir,Os), discovered in an inclusion of the Allende meteorite.

hexatestibiopanickelite
A hexagonal-dihexagonal dipyramidal mineral containing antimony, nickel, palladium, and tellurium.

heyite
A monoclinic-prismatic mineral containing iron, lead, oxygen, and vanadium.

heyrovskyite
A sulfosalt mineral with the formula Pb₆Bi₂S₉.

hibbingite
An orthorhombic-dipyramidal mineral containing chlorine, hydrogen, iron, magnesium, and oxygen.

hibonite
A calcium aluminate mineral found in carbonaceous chondrite meteorites.

hibonites
plural of hibonite

hibschite
An isometric-hexoctahedral mineral containing aluminum, calcium, hydrogen, oxygen, and silicon.

hidalgoite
A trigonal-hexagonal scalenohedral mineral containing aluminum, arsenic, hydrogen, lead, oxygen, and sulfur.

hiddenite
A pale green form of spodumene that is sometimes used as a gemstone.

hiddenites
plural of hiddenite

hielmite
Alternative form of hjelmite.

hieratite
An isometric-hexoctahedral mineral containing fluorine, potassium, and silicon.

hilairite
A trigonal-hexagonal scalenohedral light brown mineral containing hydrogen, oxygen, silicon, sodium, and zirconium.

hillebrandite
An orthorhombic-pyramidal mineral containing calcium, hydrogen, oxygen, and silicon.

hillite
A triclinic-pinacoidal mineral containing calcium, hydrogen, magnesium, oxygen, phosphorus, sodium, and zinc.

hinsdalite
A trigonal-hexagonal scalenohedral mineral containing aluminum, hydrogen, lead, oxygen, phosphorus, strontium, and sulfur.

hintzeite
A potassium magnesium borate mineral from Staßfurt, Germany.

hislopite
A bright green variety of calcite.

hjelmite
A discredited mineral species.

hocartite
A tetragonal-scalenohedral brownish gray mineral containing iron, silver, sulfur, and tin.

hochelagaite
A monoclinic white mineral containing calcium, hydrogen, niobium, oxygen, sodium, and strontium.

hoelite
A monoclinic-prismatic mineral containing carbon, hydrogen, and oxygen.

hoganite
A monoclinic-prismatic bluish green mineral containing carbon, copper, hydrogen, iron, and oxygen.

hohmannite
A triclinic-pinacoidal mineral containing hydrogen, iron, oxygen, and sulfur.

hokutolite
A rare mineral containing radioactive radium elements generated by the hot spring environment.

holdenite
An orthorhombic-dipyramidal mineral containing arsenic, hydrogen, magnesium, manganese, oxygen, silicon, and zinc.

holfertite
A trigonal-pyramidal mineral containing calcium, hydrogen, iron, oxygen, potassium, titanium, and uranium.

hollandite
A monoclinic-prismatic white mineral containing aluminum, barium, iron, lead, manganese, oxygen, silicon, and sodium.

hollingworthite
An isometric-diploidal gray mineral containing arsenic, palladium, platinum, rhodium, and sulfur.

hollingworthites
plural of hollingworthite

holmbushite
Synonym of lewistonite.

holohedra
plural of holohedron

holohedron
A holohedral crystal.

holohedrons
plural of holohedron

hololithe
A ring made entirely from a gemstone.

holosiderite
meteoric iron; a meteorite consisting of metallic iron without stony matter.

holosiderites
plural of holosiderite

holtedahlite
A trigonal-ditrigonal pyramidal colorless mineral containing carbon, hydrogen, magnesium, oxygen, and phosphorus.

holtite
An orthorhombic-dipyramidal mineral containing aluminum, antimony, arsenic, boron, hydrogen, iron, oxygen, silicon, and tantalum.

holyokeite
An igneous rock with an ophitic texture.

homilite
A monoclinic-prismatic mineral containing boron, calcium, iron, magnesium, oxygen, and silicon.

honessite
A trigonal-hexagonal scalenohedral mineral containing hydrogen, iron, nickel, oxygen, and sulfur.

honeystone
The mineral mellite.

hongshiite
A trigonal-hexagonal scalenohedral mineral containing copper and platinum.

hopeite
An orthorhombic-dipyramidal mineral containing hydrogen, oxygen, phosphorus, and zinc.

horbachite
Synonym of pentlandite.

hornblendite
A plutonic, ultramafic igneous rock composed mostly of hornblende.

hornblendites
plural of hornblendite

hortonolite
A kind of magnesium-bearing fayalite mineral.

hortonolites
plural of hortonolite

hotsonite
A mineral containing aluminum, sulfur, oxygen, phosphorus and hydrogen originally found in South Africa.

howardevansite
A triclinic-pinacoidal black mineral containing copper, iron, oxygen, sodium, and vanadium.

howieite
A triclinic mineral containing aluminum, hydrogen, iron, magnesium, manganese, oxygen, silicon, and sodium.

howieites
plural of howieite

hsianghualite
An isometric-tetartoidal white mineral containing beryllium, calcium, fluorine, lithium, oxygen, and silicon.

huangite
A trigonal-hexagonal scalenohedral mineral containing aluminum, calcium, hydrogen, oxygen, and sulfur.

huantajayite
An argentian halite mineral.

huanzalaite
A monoclinic mineral containing magnesium, oxygen, and tungsten.

hubeite
A triclinic-pinacoidal mineral containing aluminum, calcium, hydrogen, iron, manganese, oxygen, and silicon.

hubnerite
Alternative spelling of hübnerite.

hubnerites
plural of hubnerite

hudsonite
Synonym of cortlandtite.

huebnerite
Alternative spelling of hübnerite.

huebnerites
plural of huebnerite

huemulite
A triclinic-pinacoidal mineral containing hydrogen, magnesium, oxygen, sodium, and vanadium.

hulsite
A monoclinic-prismatic black mineral containing boron, iron, magnesium, oxygen, and tin.

humberstonite
A trigonal-rhombohedral colorless mineral containing hydrogen, magnesium, nitrogen, oxygen, potassium, sodium, and sulfur.

humboldtine
A rare monoclinic-prismatic mineral containing carbon, hydrogen, iron, and oxygen.

huminite
A form of vitrinite that has a dull, non-glassy appearance.

huminites
plural of huminite

humite
An orthorhombic-dipyramidal mineral containing fluorine, hydrogen, iron, magnesium, oxygen, and silicon.

humites
plural of humite

hummerite
A triclinic-pinacoidal mineral containing hydrogen, magnesium, oxygen, potassium, and vanadium.

hunchunite
An isometric-hexoctahedral mineral containing gold, lead, and silver.

hungchaoite
A triclinic-pinacoidal mineral containing boron, hydrogen, magnesium, and oxygen.

huntite
A trigonal-trapezohedral mineral containing calcium, carbon, magnesium, and oxygen.

hurlbutite
A monoclinic-prismatic mineral containing beryllium, calcium, oxygen, and phosphorus.

hutchinsonite
A rare sulfosalt mineral of thallium, arsenic and lead.

huttonite
A monoclinic-prismatic mineral containing oxygen, silicon, and thorium.

hyalite
A form of opal.

hyalotekite
A triclinic-pinacoidal mineral containing aluminum, barium, beryllium, boron, calcium, chlorine, copper, fluorine, iron, lead, magnesium, manganese, oxygen, potassium, silicon, and sodium.

hyalotuff
A vitric tuff.

hydrargillite
Alternative form of hydrargyllite.

hydrargyllite
gibbsite