intersilite
A monoclinic-prismatic mineral containing hydrogen, manganese, oxygen, silicon, sodium, and titanium.

interstice
A small opening or space between objects, especially adjacent objects or objects set closely together, such as between cords in a rope, components of a multiconductor electrical cable or atoms in a crystal.
A fragment of space.
An interval of time required by the Roman Catholic Church between the attainment of different degrees of an order.
A small interval of time free to be spent on activities other than one's primary goal.

interstices
plural of interstice

iowaite
A trigonal-hexagonal scalenohedral mineral containing chlorine, hydrogen, iron, magnesium, and oxygen.

iowaites
plural of iowaite

iquiqueite
A trigonal-ditrigonal pyramidal yellow mineral containing boron, chromium, hydrogen, magnesium, oxygen, potassium, and sodium.

iranite
A triclinic-pedial mineral containing chromium, copper, fluorine, hydrogen, lead, oxygen, and silicon.

iraqite
A greenish-yellow radioactive mineral.

irarsite
An isometric-diploidal iron black mineral containing arsenic, iridium, platinum, rhodium, ruthenium, and sulfur.

irhtemite
A monoclinic mineral containing arsenic, calcium, hydrogen, magnesium, and oxygen.

iridarsenite
A monoclinic-prismatic gray mineral containing arsenic, iridium, and ruthenium.

iriginite
An orthorhombic-dipyramidal canary yellow mineral containing hydrogen, molybdenum, oxygen, and uranium.

ironstone
Any ore of iron which is impure through the admixture of silica or clay.
A type of vitreous pottery similar to stoneware

ironstones
plural of ironstone

irtyshite
A hexagonal mineral containing sodium, tantalum, niobium, and oxygen.

irtyshites
plural of irtyshite

isanomal
An isoline joining points with the same degree of anomaly or deviation in some meteorological or geological phenomenon.
An isabnormal.

isanomalies
plural of isanomaly

isanomals
plural of isanomal

isanomaly
An isanomal.

ishikawaite
A rare mineral composed of uranium, niobium, iron, tantalum, and yttrium.

ishkyldite
A variety of chrysotile.

isocubanite
An isometric-hexoctahedral bronze mineral containing copper, iron, and sulfur.

isokite
A monoclinic-prismatic mineral containing calcium, fluorine, magnesium, oxygen, and phosphorus.

isolueshite
A brownish-black mineral comprising mostly niobium and lanthanum.

isomertieite
An isometric-hexoctahedral silver white mineral containing antimony, arsenic, and palladium.

isostructure
A solid that has the same electronic or crystal structure as another

isostructures
plural of isostructure

isovite
An isometric-hexoctahedral iron gray mineral containing carbon, chromium, and iron.

itabirite
A laminated form of quarzite with muscovite or other iron minerals.

itacolumite
A porous yellow sandstone that is flexible when cut into thin strips.

itacolumites
plural of itacolumite

itoigawaite
An orthorhombic-dipyramidal blue mineral containing aluminum, hydrogen, oxygen, silicon, and strontium.

itoite
An orthorhombic-dipyramidal silky white mineral containing germanium, hydrogen, lead, oxygen, and sulfur.

ittnerite
A dark blue or grey mineral, consisting chiefly of silica, alumina, potash, and soda.

iuell
Obsolete form of jewel.

iuells
plural of iuell

ivigtite
illite.

iwakiite
A tetragonal-ditetragonal dipyramidal greenish black mineral containing iron, manganese, and oxygen.

ixiolite
A monoclinic-prismatic mineral containing iron, manganese, niobium, oxygen, tantalum, and tin.

izoklakeite
An orthorhombic-dipyramidal lead gray mineral containing antimony, bismuth, copper, iron, lead, and sulfur.

jacinth
A translucent, reddish type of zircon used as a gemstone; a hyacinth.

jacinths
plural of jacinth

jacupirangite
Any of a melanocratic series of igneous rocks of varying composition, the characteristic minerals being purple titanaugite, nepheline, and magnetite or titanoferrite.

jacupirangites
plural of jacupirangite

jagoite
A hexagonal-ditrigonal dipyramidal yellow green mineral containing calcium, chlorine, hydrogen, iron, lead, magnesium, oxygen, silicon, and sodium.

jagowerite
A triclinic-pinacoidal light green mineral containing aluminum, barium, hydrogen, oxygen, and phosphorus.

jagueite
A monoclinic mineral containing copper, palladium, and selenium.

jaipurite
A hexagonal-dihexagonal dipyramidal steel gray mineral containing cobalt and sulfur.

jaloallofane
Synonym of hyalophane.

jalpaite
A tetragonal-ditetragonal dipyramidal mineral containing copper, silver, and sulfur.

jamborite
A hexagonal green mineral containing hydrogen, iron, nickel, oxygen, and sulfur.

jamesite
A triclinic-pinacoidal reddish brown mineral containing arsenic, iron, lead, oxygen, and zinc.

janggunite
An orthorhombic black mineral containing hydrogen, iron, manganese, and oxygen.

janhaugite
A monoclinic-prismatic reddish brown mineral containing calcium, fluorine, hydrogen, iron, manganese, niobium, oxygen, silicon, sodium, titanium, and zirconium.

jankovicite
A triclinic-pinacoidal black mineral containing antimony, arsenic, sulfur, and thallium.

jarandolite
A monoclinic-prismatic mineral containing boron, calcium, chlorine, hydrogen, oxygen, and silicon.

jarlite
A monoclinic-prismatic mineral containing aluminum, barium, calcium, fluorine, hydrogen, lithium, magnesium, oxygen, sodium, and strontium.

jarosite
A mineral with rhombohedral crystals, KFe₃³⁺(SO₄)₂(OH)₆.

jarosites
plural of jarosite

jasmundite
A tetragonal-scalenohedral mineral containing calcium, oxygen, silicon, and sulfur.

jaspellite
A banded form of hematite

jaspellites
plural of jaspellite

jasperoids
plural of jasperoid

jaspilite
A compact siliceous rock resembling jasper.

jaspilites
plural of jaspilite

jaspillite
Alternative form of jaspilite.

jaszczakite
A orthorhombic mineral containing gold, bismuth, and sulphur.

jaulingite
A resinous variety of amber.

javaite
A tektite found on and around the island of Java.

javaites
plural of javaite

javanite
Synonym of javaite.

javanites
plural of javanite

jayet
jet (form of coal)

jazel
An azure gem found in the East Indies.

jeanbandyite
A tetragonal-dipyramidal mineral containing hydrogen, iron, manganese, oxygen, and tin.

jeat
Obsolete form of jet.

jeats
plural of jeat

jedwabite
A hexagonal-dihexagonal pyramidal grayish yellow mineral containing iron, niobium, and tantalum.

jefferisite
A kind of vermiculite.

jeffreyite
An orthorhombic-disphenoidal colorless mineral containing aluminum, beryllium, calcium, hydrogen, oxygen, silicon, and sodium.

jenite
The mineral ilvaite.

jennite
A triclinic-pinacoidal white mineral containing calcium, hydrogen, oxygen, and silicon.

jensenite
A monoclinic-prismatic emerald green mineral containing copper, hydrogen, oxygen, and tellurium.

jentschite
A monoclinic-prismatic mineral containing antimony, arsenic, lead, sulfur, and thallium.

jeppeite
A monoclinic-prismatic black mineral containing barium, iron, oxygen, potassium, and titanium.

jeremeievite
Alternative form of jeremejevite.

jeremejeffite
Alternative form of jeremejevite.

jeremejevite
A hexagonal-dipyramidal mineral containing aluminum, boron, fluorine, hydrogen, and oxygen.

jeremejewite
Alternative form of jeremejevite.

jeromite
An amorphous mineral containing arsenic, selenium, and sulfur.

jervisite
A monoclinic-prismatic light green mineral containing calcium, iron, magnesium, oxygen, scandium, silicon, and sodium.

jewel
A precious or semi-precious stone; gem, gemstone.
A valuable object used for personal ornamentation, especially one made of precious metals and stones; a piece of jewellery.
Anything precious or valuable.
A bearing for a pivot in a watch, formed of a crystal or precious stone.
Any of various lycaenid butterflies of the genus Hypochrysops.
The clitoris.
A jewel box (optical disc container).

jewelery
Misspelling of jewellery (UK).
Misspelling of jewelry (US).

jewelleries
plural of jewellery