monocrystals
plural of monocrystal

monoquartz
A monocrystalline quartz.

monoquartzite
A monocrystalline quartzite.

monrolite
A form of sillimanite.

montanite
A monoclinic mineral containing bismuth, hydrogen, oxygen, and tellurium.

montbrayite
A triclinic-pinacoidal mineral containing antimony, gold, and tellurium.

montebrasite
A triclinic-pinacoidal mineral containing aluminum, fluorine, hydrogen, lithium, oxygen, and phosphorus.

monteponite
An isometric-hexoctahedral black mineral containing cadmium and oxygen.

montesommaite
An orthorhombic-pyramidal colorless mineral containing aluminum, hydrogen, oxygen, potassium, silicon, and sodium.

montgomeryite
A monoclinic-prismatic mineral containing aluminum, calcium, hydrogen, magnesium, oxygen, and phosphorus.

monticellite
An orthorhombic-dipyramidal mineral containing calcium, magnesium, oxygen, and silicon.

monticellites
plural of monticellite

montmartrite
gypsum from Montmartre

montmorillonoid
Synonym of bentonite.

montroseite
An orthorhombic-dipyramidal mineral containing hydrogen, iron, oxygen, and vanadium.

montroydite
An orthorhombic-dipyramidal mineral containing mercury and oxygen.

monzodiorite
A type of diorite that has less than 5% quartz

monzodiorites
plural of monzodiorite

monzogabbro
An intrusive rock with a composition intermediate between gabbro and monzonite.

monzogabbros
plural of monzogabbro

monzonite
An intrusive igneous rock composed mostly of plagioclase and orthoclase

monzonites
plural of monzonite

monzonorite
A charnockitic monzodiorite.

monzosyenite
Synonym of monzonite.

moolooite
A rare blue-green mineral, a hydrated copper oxalate with an orthorhombic crystalline structure.

mooreite
A monoclinic-prismatic mineral containing hydrogen, magnesium, manganese, oxygen, sulfur, and zinc.

moorhouseite
A monoclinic-prismatic pink mineral containing cobalt, hydrogen, manganese, nickel, oxygen, and sulfur.

mopungite
A tetragonal-dipyramidal mineral containing antimony, hydrogen, oxygen, and sodium.

moraesite
A beryllium-phosphorus mineral.

mordenite
An orthorhombic-pyramidal mineral containing aluminum, calcium, hydrogen, oxygen, potassium, silicon, and sodium.

mordenites
plural of mordenite

morenosite
An orthorhombic-disphenoidal mineral containing hydrogen, nickel, oxygen, and sulfur.

morganite
A gemstone of pegmatite deposits. Morganite is a transparent pink variety of beryl.

morganites
plural of morganite

morimotoite
An isometric-hexoctahedral black mineral containing calcium, iron, oxygen, silicon, and titanium.

moroxite
A greenish-blue variety of apatite.

morozeviczite
An isometric-hexoctahedral brownish gray mineral containing germanium, iron, lead, and sulfur.

morphostructure
A geological feature of the landscape typically caused by tectonic activity and climate

morphostructures
plural of morphostructure

moschelite
A tetragonal-ditetragonal dipyramidal mineral containing iodine and mercury.

mosesite
A very rare mercury mineral found as an accessory in deposits of mercury, often in conjunction with limestone.

motukoreaite
A trigonal-hexagonal scalenohedral mineral containing aluminum, carbon, hydrogen, magnesium, oxygen, sodium, and sulfur.

mounanaite
A triclinic-pinacoidal brownish red mineral containing hydrogen, iron, lead, oxygen, and vanadium.

mountainite
A monoclinic-prismatic white mineral containing calcium, hydrogen, oxygen, potassium, silicon, and sodium.

mountkeithite
A hexagonal mineral containing aluminum, carbon, chromium, copper, hydrogen, iron, magnesium, nickel, oxygen, and sulfur.

mourite
A monoclinic violet mineral containing hydrogen, molybdenum, oxygen, and uranium.

mox
Energy, vigor, courage, pluck.
A gemstone with magical properties.

mozarkite
A particular kind of rock, a form of chert, native to Missouri.

mozartite
An orthorhombic-disphenoidal mineral containing calcium, hydrogen, manganese, oxygen, and silicon.

mozgovaite
An orthorhombic-dipyramidal silver gray mineral containing bismuth, lead, selenium, and sulfur.

mpororoite
A triclinic greenish yellow mineral containing aluminum, hydrogen, oxygen, and tungsten.

mroseite
An orthorhombic-dipyramidal mineral containing calcium, carbon, oxygen, and tellurium.

mtorolite
A green variety of chalcedony, coloured by small quantities of chromium.

muckite
A resin found in cretaceous lignite in Moravia.

muckites
plural of muckite

mudslide
A geological event in which viscous mud flows down an incline.
A mixed drink consisting of vodka, Kahlúa and Baileys.

mudslides
plural of mudslide

mudstone
A fine-grained sedimentary rock whose original constituents were clays or muds.

mudstones
plural of mudstone

muirite
A tetragonal-ditetragonal dipyramidal mineral containing barium, calcium, chlorine, fluorine, hydrogen, manganese, oxygen, silicon, and titanium.

mukhinite
A monoclinic-prismatic black mineral containing aluminum, calcium, hydrogen, oxygen, silicon, and vanadium.

mullanite
Synonym of boulangerite.

mullite
An orthorhombic-dipyramidal mineral containing aluminum, oxygen, and silicon.

mullites
plural of mullite

multimicronutrient
multiple micronutrients

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

mundic
iron pyrite or arsenopyrite

mundick
Obsolete form of mundic.

mundics
plural of mundic

mundite
An orthorhombic mineral containing aluminum, hydrogen, oxygen, phosphorus, and uranium.

mundrabillaite
A monoclinic colorless mineral containing calcium, hydrogen, nitrogen, oxygen, and phosphorus.

munirite
A monoclinic-prismatic pearl white mineral containing hydrogen, oxygen, sodium, and vanadium.

murdochite
An isometric-hexoctahedral black mineral containing bromine, chlorine, copper, lead, and oxygen.

murmanite
A triclinic-pedial mineral containing hydrogen, niobium, oxygen, silicon, sodium, and titanium.

murunskite
A tetragonal-ditetragonal dipyramidal grayish orange cream mineral containing copper, iron, potassium, and sulfur.

museumite
A monoclinic dark silver gray mineral containing antimony, gold, lead, sulfur, and tellurium.

musgravite
A rare magnesiotaaffeite gemstone.

musgravites
plural of musgravite

mushistonite
An isometric-hexoctahedral mineral containing copper, hydrogen, iron, oxygen, tin, and zinc.

muskoxite
A trigonal mineral containing hydrogen, iron, magnesium, and oxygen.

muthmannite
A monoclinic-prismatic mineral containing gold, silver, and tellurium.

mutinaite
An orthorhombic-dipyramidal mineral containing aluminum, calcium, hydrogen, oxygen, silicon, and sodium.

myrmekite
A vermicular intergrowth of quartz in plagioclase.

myrmekites
plural of myrmekite

nabalamprophyllite
A monoclinic-prismatic mineral containing aluminum, barium, calcium, fluorine, hydrogen, iron, magnesium, manganese, oxygen, potassium, silicon, sodium, strontium, and titanium.

nabaphite
An isometric-tetartoidal colorless mineral containing barium, hydrogen, oxygen, phosphorus, and sodium.

nabesite
An orthorhombic-disphenoidal mineral containing beryllium, hydrogen, oxygen, silicon, and sodium.

nabiasite
An isometric-diploidal dark red mineral containing arsenic, barium, hydrogen, manganese, oxygen, and vanadium.

nablock
A rounded mass, as of flint in chalk, or of ironstone in coal.

nablocks
plural of nablock

nabokoite
A tetragonal-ditetragonal dipyramidal mineral containing chlorine, copper, oxygen, potassium, sulfur, and tellurium.

nacaphite
A triclinic-pinacoidal mineral containing calcium, fluorine, oxygen, phosphorus, and sodium.

nacker
Obsolete form of nacre.

nacres
plural of nacre

nadorite
An orthorhombic brown or yellow mineral containing lead and tin.

nafertisite
A monoclinic-prismatic mineral containing hydrogen, iron, oxygen, silicon, sodium, and titanium.

nagashimalite
An orthorhombic-dipyramidal greenish black mineral containing barium, boron, chlorine, hydrogen, oxygen, silicon, titanium, and vanadium.

nagatelite
A phosphatian allanite mineral.