eremeevite
Alternative form of jeremejevite.

eremeyevite
Alternative form of jeremejevite.

ericaite
An orthorhombic-pyramidal mineral containing boron, chlorine, iron, magnesium, manganese, and oxygen.

ericssonite
A monoclinic-prismatic reddish black mineral containing barium, hydrogen, iron, manganese, oxygen, and silicon.

erikapohlite
A mineral, the calcium-dominant analog of keyite.

erinite
A hydrous copper arseniate of an emerald-green colour.

erinites
plural of erinite

eriochalcite
An orthorhombic-dipyramidal mineral containing chlorine, copper, hydrogen, and oxygen.

erlianite
An orthorhombic black mineral containing hydrogen, iron, magnesium, oxygen, silicon, and vanadium.

erlichmanite
An isometric-diploidal gray white mineral containing osmium and sulfur.

ernienickelite
A trigonal reddish black mineral containing hydrogen, manganese, nickel, and oxygen.

erniggliite
A trigonal-rhombohedral mineral containing arsenic, sulfur, thallium, and tin.

ernstite
A monoclinic yellow brown mineral containing aluminum, hydrogen, iron, manganese, oxygen, and phosphorus.

ershovite
A triclinic-pinacoidal mineral containing hydrogen, iron, manganese, oxygen, potassium, silicon, sodium, and titanium.

ertixiite
An isometric-diploidal mineral containing oxygen, silicon, and sodium.

erubescite
Synonym of bornite.

erubescites
plural of erubescite

erythrine
Synonym of erythrite.

erythrines
plural of erythrine

erythrosiderite
An orthorhombic-dipyramidal mineral containing chlorine, hydrogen, iron, oxygen, and potassium.

escarbuncle
A carbuncle (gemstone).
A carbuncle (heraldic charge).

escarbuncles
plural of escarbuncle

eschynite
A rare mineral, containing chiefly niobium, titanium, thorium, and cerium.

eschynites
plural of eschynite

eskebornite
A tetragonal-scalenohedral bronze mineral containing copper, iron, and selenium.

eskimoite
A monoclinic-domatic galena white mineral containing bismuth, lead, silver, and sulfur.

eskolaite
A trigonal-hexagonal scalenohedral mineral containing chromium and oxygen.

esperanzaite
A monoclinic-prismatic blue green mineral containing aluminum, arsenic, calcium, fluorine, hydrogen, oxygen, and sodium.

esseneite
A monoclinic-prismatic reddish brown mineral containing aluminum, calcium, iron, oxygen, and silicon.

essonite
Alternative spelling of hessonite (“Cinnamon stone, a variety of garnet”).

essonites
plural of essonite

estramadurite
Synonym of apatite.

ethmolith
A funnel-shaped body of igneous rock that intrudes into stratified rocks.

eucairite
An orthorhombic-dipyramidal mineral containing copper, selenium, and silver.

euchlorite
euchlorine

eucolite
An optically negative variety of eudialyte.

eucolites
plural of eucolite

eudidymite
A monoclinic-prismatic mineral containing beryllium, hydrogen, oxygen, silicon, and sodium.

eugenite
An isometric-hextetrahedral silver white mineral containing mercury and silver.

eugsterite
A monoclinic colorless mineral containing calcium, hydrogen, oxygen, sodium, and sulfur.

euhedra
plural of euhedron

euhedron
A well formed crystal.

eulytine
A mineral containing bismuth, silicon and oxygen.

eulytite
eulytine

eulytites
plural of eulytite

euosmite
A fossil resin with a strong pleasant odour.

euphotide
A kind of gabbro with saussurite

euphotides
plural of euphotide

eurite
A compact feldspathic rock; felsite.

eusynchite
Synonym of descloizite.

eutectofelsite
Volcanic rock.

eutectophyre
Light-colored volcanic rock, eutectofelsite.

eutrustox
A eutrophic ustox.

eutrustoxes
plural of eutrustox

evansite
An amorphous mineral containing aluminum, hydrogen, oxygen, and phosphorus.

evdokimovite
An monoclinic mineral containing hydrogen, thallium, vanadium, sulphur, and oxygen.

eveite
An orthorhombic-dipyramidal apple green mineral containing arsenic, hydrogen, manganese, and oxygen.

evenkite
A rare hydrocarbon mineral.

eveslogite
A monoclinic-prismatic mineral containing aluminum, barium, calcium, chlorine, fluorine, hydrogen, iron, manganese, niobium, oxygen, potassium, rubidium, silicon, sodium, strontium, tantalum, titanium, and zirconium.

ewaldite
A hexagonal-dihexagonal pyramidal mineral containing barium, calcium, carbon, cerium, oxygen, sodium, strontium, and yttrium.

exclay
lightweight aggregate made by heating clay

exoskarn
A skarn of igneous origin that occurs at and outside the granite that produced it, and is an alteration of wall rock.

exoskarns
plural of exoskarn

eyestone
A small, lenticular, calcareous body, especially an operculum of a small shell of the family Tubinidae, used to remove a foreign substance from the eye.
Eye agate.

eyestones
plural of eyestone

eylettersite
A trigonal-hexagonal scalenohedral cream white mineral containing aluminum, hydrogen, lead, oxygen, phosphorus, silicon, and thorium.

eyselite
An orthorhombic mineral containing gallium, germanium, hydrogen, iron, and oxygen.

ezcurrite
A triclinic-pinacoidal colorless mineral containing boron, hydrogen, oxygen, and sodium.

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

faheyite
A hexagonal-trapezohedral mineral containing beryllium, hydrogen, iron, magnesium, manganese, oxygen, and phosphorus.

fahleite
An orthorhombic mineral containing arsenic, calcium, hydrogen, iron, oxygen, and zinc.

fahlerz
fahlband

fahlore
Antimony-bearing copper arsenate

fahlunite
A variation of fahlunite.

fahlunites
plural of fahlunite

fairbankite
A triclinic-pinacoidal colorless mineral containing lead, oxygen, and tellurium.

fairchildite
A hexagonal-dihexagonal dipyramidal colorless mineral containing calcium, carbon, oxygen, and potassium.

fairfieldite
A triclinic-pinacoidal mineral containing calcium, hydrogen, iron, manganese, oxygen, and phosphorus.

faizievite
A triclinic mineral containing calcium, flourine, potassium, lithium, sodium, oxygen, silicon and titanium

falcondoite
An orthorhombic-dipyramidal mineral containing hydrogen, magnesium, nickel, oxygen, and silicon.

falkmanite
Synonym of boulangerite.

famatinite
A tetragonal-scalenohedral pale brownish pink mineral containing antimony, copper, and sulfur.

fangite
An orthorhombic-dipyramidal mineral containing arsenic, sulfur, and thallium.

farcilite
Pudding stone.

farcilites
plural of farcilite

farringtonite
A monoclinic-prismatic mineral containing magnesium, oxygen, and phosphorus.

fasibitikite
A kind of riebeckite-aegirine granite from Malagasy.

fasti
The calendar, which gave the days for festivals, courts, etc., corresponding to a modern almanac. They were generally engraved on stone, e.g. marble
Records or registers of important events (outside the dominion of Ancient Rome)

faustite
A triclinic-pinacoidal apple green mineral containing aluminum, copper, hydrogen, oxygen, phosphorus, and zinc.

fedorite
A triclinic-pinacoidal mineral containing aluminum, calcium, fluorine, hydrogen, oxygen, potassium, silicon, and sodium.

fedorovskite
An orthorhombic-dipyramidal brown mineral containing boron, calcium, hydrogen, magnesium, manganese, and oxygen.

fedotovite
A monoclinic-prismatic mineral containing copper, oxygen, potassium, and sulfur.

feinglosite
A monoclinic pale olive green mineral containing arsenic, hydrogen, iron, lead, oxygen, sulfur, and zinc.

feitknechtite
A hexagonal mineral containing hydrogen, manganese, and oxygen.

feitsui
jadeite

feklichevite
A trigonal-ditrigonal pyramidal mineral containing calcium, cerium, chlorine, fluorine, hafnium, hydrogen, iron, lanthanum, manganese, niobium, oxygen, silicon, sodium, strontium, titanium, and zirconium.

felbertalite
A monoclinic-prismatic gray mineral containing bismuth, cadmium, copper, lead, silver, and sulfur.

feldsparphyre
A feldspathic porphyry.

felsite
A fine grained volcanic extrusive rock, generally light in color, composed of felsic minerals.
Any light-colored volcanic rock whose true mineralogy is not yet determined.

felsites
plural of felsite