gorceixite
A trigonal-hexagonal scalenohedral mineral containing aluminum, barium, hydrogen, oxygen, and phosphorus.

gordonite
A triclinic-pinacoidal mineral containing aluminum, hydrogen, magnesium, oxygen, and phosphorus.

gordunite
A variety of garnet-bearing wehrlite found in Switzerland.

gortdrumite
An orthorhombic mineral containing copper, iron, mercury, and sulfur.

goshenite
A colourless variety of beryl.

goslarite
An orthorhombic-disphenoidal mineral containing hydrogen, oxygen, sulfur, and zinc.

goslarites
plural of goslarite

gottardiite
An orthorhombic-dipyramidal colorless mineral containing aluminum, calcium, hydrogen, magnesium, oxygen, silicon, and sodium.

gottlobite
An orthorhombic-disphenoidal mineral containing arsenic, calcium, hydrogen, magnesium, oxygen, and vanadium.

goudeyite
A hexagonal mineral containing aluminum, arsenic, copper, hydrogen, oxygen, and yttrium.

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

goyazite
A trigonal-hexagonal scalenohedral mineral containing aluminum, hydrogen, oxygen, phosphorus, and strontium.

graemite
An orthorhombic-dipyramidal mineral containing copper, hydrogen, oxygen, and tellurium.

graeserite
A monoclinic-prismatic black mineral containing arsenic, hydrogen, iron, oxygen, and titanium.

graftonite
A monoclinic-prismatic mineral containing calcium, iron, manganese, oxygen, and phosphorus.

grammatite
tremolite

grammatites
plural of grammatite

granatite
Staurolite.

grandidierite
An orthorhombic-dipyramidal bluish green mineral containing aluminum, boron, iron, magnesium, oxygen, and silicon.

grandreefite
A monoclinic-prismatic colorless mineral containing fluorine, lead, oxygen, and sulfur.

graniteware
Ironware that has been coated with a layer of vitreous enamel with a swirled or speckled pattern resembling granite.
Pottery with the same type of enamel coating.

granitewares
plural of graniteware

granitite
Any of various types of granite containing a high percentage of biotite.

granodiorite
An intrusive igneous rock similar to granite, but containing more plagioclase than potassium feldspar.

granodiorites
plural of granodiorite

granofels
A medium- to coarse-grained metamorphic rock which has a granoblastic texture and lacks distinct foliation or lineation.

granogabbro
A rock composed of granite and gabbro.

granophyre
A subvolcanic rock with angular intergrowths of quartz and alkali feldspar.

granophyres
plural of granophyre

granosyenite
A syenite closer to granitic composition.

grantsite
A monoclinic-prismatic mineral containing calcium, hydrogen, oxygen, sodium, and vanadium.

granulite
A fine-grained metamorphic rock composed chiefly of feldspar, quartz, and garnets.

granulites
plural of granulite

grapholite
Any variety of slate suitable to be written on.

grapholites
plural of grapholite

gratonite
A trigonal-ditrigonal pyramidal mineral containing arsenic, lead, and sulfur.

grattarolaite
A trigonal-ditrigonal pyramidal mineral containing iron, oxygen, and phosphorus.

grauwacke
Greywacke.

grauwackes
plural of grauwacke

gravegliaite
An orthorhombic-dipyramidal colorless mineral containing hydrogen, manganese, oxygen, and sulfur.

grayite
A hexagonal-trapezohedral mineral containing calcium, hydrogen, lead, oxygen, phosphorus, and thorium.

graywacke
Alternative form of greywacke.

graywackes
plural of graywacke

graywether
Alternative form of greywether.

graywethers
plural of graywether

grechishchevite
A tetragonal mineral containing bromine, chlorine, iodine, mercury, and sulfur.

greenlandite
Synonym of columbite.

greenovite
A certain manganese sphene mineral.

greensand
A greenish sandstone containing glauconite.

greensands
plural of greensand

gregoryite
A mineral containing calcium, carbon, oxygen, potassium and sodium.

greifensteinite
A monoclinic-prismatic dark olive green mineral containing aluminum, beryllium, calcium, hydrogen, iron, magnesium, manganese, oxygen, and phosphorus.

grenatite
Synonym of staurolite.

greywacke
A hard dark sandstone with poorly sorted angular grains of quartz, feldspar, and small rock fragments in a compact, clay-fine matrix.

greywackes
plural of greywacke

greywether
A large block of hard sandstone found sporadically over south and southeast England.

greywethers
plural of greywether

griffithite
A variety of saponite.

grike
A deep cleft formed in limestone surfaces due to water erosion; providing a unique habitat for plants.

grikes
plural of grike

grimaldiite
A trigonal-hexagonal scalenohedral mineral containing chromium, hydrogen, and oxygen.

grimselite
A hexagonal-ditrigonal dipyramidal yellow mineral containing carbon, hydrogen, oxygen, potassium, sodium, and uranium.

griphite
A vitreous, resinous, yellow or dark-brown, molecular compound that is both diploidal and isometric.

griphites
plural of griphite

griqualandite
An altered form of crocidolite.

grischunite
An orthorhombic-dipyramidal dark reddish brown mineral containing arsenic, calcium, hydrogen, iron, manganese, oxygen, and sodium.

grossite
A monoclinic-prismatic mineral containing aluminum, calcium, and oxygen.

grossularite
Synonym of grossular.

grossularites
plural of grossularite

grossulars
plural of grossular

grothite
Synonym of titanite.

grothites
plural of grothite.

groutite
An orthorhombic-dipyramidal blue black mineral containing hydrogen, manganese, and oxygen.

growan
A decomposed granite, forming a mass of gravel, as in tin lodes in Cornwall.

growans
plural of growan

grumantite
An orthorhombic-pyramidal mineral containing hydrogen, oxygen, silicon, and sodium.

grumiplucite
A monoclinic-prismatic grayish black mineral containing bismuth, mercury, and sulfur.

gruzdevite
A trigonal-pyramidal grayish black mineral containing antimony, copper, mercury, and sulfur.

gryke
Alternative form of grike.

grykes
plural of gryke

guadalcazarite
A variety of metacinnabar containing zinc.

guadarramite
Synonym of ilmenite.

guanajuatite
An orthorhombic-dipyramidal mineral containing bismuth and selenium.

guanite
struvite

guarinoite
A hexagonal mineral containing chlorine, cobalt, hydrogen, nickel, oxygen, sulfur, and zinc.

gudmundite
A monoclinic-prismatic mineral containing antimony, iron, and sulfur.

guejarite
chalcostibite

guettardite
A monoclinic-prismatic grayish black mineral containing antimony, arsenic, lead, and sulfur.

gugiaite
A tetragonal-scalenohedral colorless mineral containing beryllium, calcium, oxygen, and silicon.

guildite
A monoclinic-prismatic mineral containing copper, hydrogen, iron, oxygen, and sulfur.

guilleminite
An orthorhombic-pyramidal mineral containing barium, hydrogen, oxygen, selenium, and uranium.

guisards
plural of guisard

gupeiite
An isometric-hexoctahedral mineral containing iron and silicon.

gurhofite
A form of dolomite.

gustavite
An orthorhombic-dipyramidal steel gray mineral containing bismuth, lead, silver, and sulfur.

guyanaite
An orthorhombic-dipyramidal mineral containing chromium, hydrogen, and oxygen.

gymnite
An amorphous form of antigorite.

gypcrete
A sedimentary rock, a hardened deposit of gypsum, capable of cementing together with other materials.

gypcretes
plural of gypcrete

gyrolite
A hexagonal-pyramidal mineral containing aluminum, calcium, hydrogen, oxygen, silicon, and sodium.

gyrolites
plural of gyrolite

haapalaite
A trigonal-hexagonal scalenohedral bronze red mineral containing hydrogen, iron, magnesium, nickel, oxygen, and sulfur.

haemafibrite
synadelphite

hagendorfite
A monoclinic-prismatic greenish black mineral containing calcium, iron, magnesium, manganese, oxygen, phosphorus, and sodium.

haggertyite
A rare hexagonal mineral, a barium iron magnesium titanate.

haggertyites
plural of haggertyite

hahnium
(obsolete) A rejected name for dubnium.
(obsolete) A rejected name for hassium.

haidingerite
A mineral consisting of the arseniate of lime, its formula is Ca(AsO₃OH)·H₂O