beryllite
An orthorhombic white mineral containing beryllium, hydrogen, oxygen, and silicon.

beryllosodalite
Synonym of tugtupite.

berzelianite
An isometric-hexoctahedral mineral containing copper and selenium.

berzeliite
An isometric-hexoctahedral mineral containing arsenic, calcium, magnesium, manganese, oxygen, and sodium.

berzeline
A white variety of the mineral haüyne.

betpakdalite
A monoclinic-prismatic mineral containing arsenic, calcium, hydrogen, iron, magnesium, molybdenum, and oxygen.

beudantite
A trigonal-hexagonal scalenohedral mineral containing arsenic, hydrogen, iron, lead, oxygen, and sulfur.

beusite
A monoclinic-prismatic reddish brown mineral containing calcium, iron, magnesium, manganese, oxygen, and phosphorus.

bevelment
The replacement of an edge by two similar planes, equally inclined to the including faces or adjacent planes.

bevelments
plural of bevelment

beyrichite
Synonym of violarite.

bezsmertnovite
An orthorhombic-dipyramidal bright orange yellow mineral containing copper, gold, lead, and tellurium.

bicchulite
An isometric-hextetrahedral colorless mineral containing aluminum, calcium, hydrogen, oxygen, and silicon.

bideauxite
An isometric-hexoctahedral mineral containing chlorine, fluorine, hydrogen, lead, oxygen, and silver.

bieberite
A monoclinic-prismatic mineral containing cobalt, hydrogen, oxygen, and sulfur.

biehlite
A monoclinic-prismatic white mineral containing antimony, arsenic, molybdenum, and oxygen.

bigcreekite
An orthorhombic-dipyramidal mineral containing barium, hydrogen, oxygen, and silicon.

bikitaite
A triclinic-pedial mineral containing aluminum, hydrogen, lithium, oxygen, and silicon.

bilibinskite
An isometric mineral containing copper, gold, lead, and tellurium.

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

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

billingsleyite
An orthorhombic-disphenoidal lead gray mineral containing arsenic, silver, and sulfur.

billitonite
A form of tektite from Southeast Asia.

billitonites
plural of billitonite

bindheimite
An isometric-hexoctahedral mineral containing antimony, hydrogen, lead, and oxygen.

binnite
A multi-faceted variety of the mineral tennantite, found in the Binn Valley, Switzerland

biocarbon
carbon produced from biomass

biocrystal
A crystal produced by biological means.

biocrystals
plural of biocrystal

biodot
A small circle containing a liquid crystal whose colour indicates the temperature of the skin on which it placed; changes in temperature may be related to stress

biodots
plural of biodot

biogeodynamics
The (study of the) interplay of biological and geological systems

biogeotechnologies
plural of biogeotechnology

biogeotechnology
biotechnology applied to solve geological problems

biolith
A rock or other geological feature formed by living organisms.

bioliths
plural of biolith

biomineral
A mineral produced by the activity of living things

biominerals
plural of biomineral

biopelmicrite
A limestone similar to biopelsparite

biopelmicrites
plural of biopelmicrite

biopelsparite
A limestone similar to biosparite

biopelsparites
plural of biopelsparite

biosparite
A limestone composed of less than 25% oolites and less than 25% intraclasts

biosparites
plural of biosparite

biosparrudite
A limestone made from the shells of ancient gastropods

biosparrudites
plural of biosparrudite

biozone
A biostratigraphic unit: an interval of geological strata defined on the basis of its characteristic fossil taxa.
An ecozone.

biozones
plural of biozone

biphosphammite
A tetragonal-scalenohedral mineral containing hydrogen, nitrogen, oxygen, phosphorus, and potassium.

biringuccite
A monoclinic-prismatic mineral containing boron, hydrogen, oxygen, and sodium.

birthstone
Any of twelve gemstones traditionally associated with the month of one's birth.
Any of a similar list of less costly substitutes.

birthstones
plural of birthstone

bismoclite
A tetragonal-ditetragonal dipyramidal mineral containing bismuth, chlorine, and oxygen.

bismutocolumbite
An orthorhombic-dipyramidal black mineral containing bismuth, niobium, oxygen, and tantalum.

bismutoferrite
A monoclinic-domatic mineral containing bismuth, hydrogen, iron, oxygen, and silicon.

bismutohauchecornite
A tetragonal-ditetragonal dipyramidal bronze mineral containing bismuth, nickel, and sulfur.

bismutomicrolite
An isometric-hexoctahedral mineral containing bismuth, calcium, hydrogen, niobium, oxygen, and tantalum.

bismutopyrochlore
An isometric-hexoctahedral mineral containing bismuth, calcium, hydrogen, lead, niobium, oxygen, tantalum, and uranium.

bismutostibiconite
An isometric-hexoctahedral mineral containing antimony, bismuth, iron, and oxygen.

bismutotantalite
An orthorhombic-dipyramidal mineral containing bismuth, niobium, oxygen, and tantalum.

bityite
A monoclinic-prismatic mineral containing aluminum, beryllium, calcium, hydrogen, lithium, oxygen, and silicon.

bixbite
The mineral red beryl.

bjarebyite
A green mineral comprising mostly barium, phosphorus, and oxygen.

blatonite
A hexagonal canary yellow mineral containing carbon, hydrogen, oxygen, and uranium.

blatterite
An orthorhombic-dipyramidal black mineral containing antimony, boron, iron, magnesium, manganese, and oxygen.

bleasdaleite
A monoclinic-prismatic mineral containing bismuth, calcium, chlorine, copper, hydrogen, iron, oxygen, and phosphorus.

blixite
A monoclinic-prismatic mineral containing calcium, chlorine, hydrogen, lead, and oxygen.

blomstrandite
Synonym of betafite.

blueschist
A metamorphic rock containing glaucophane.

blueschists
plural of blueschist

bobfergusonite
A monoclinic-prismatic mineral containing aluminum, iron, manganese, oxygen, phosphorus, and sodium.

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

bobjonesite
A monoclinic-prismatic mineral containing hydrogen, oxygen, sulfur, and vanadium.

bobkingite
A monoclinic-prismatic pale blue mineral containing chlorine, copper, hydrogen, and oxygen.

bodenbenderite
A discredited mineral reported from Cordoba, Argentina.

bogdanovite
An isometric-hexoctahedral mineral containing copper, gold, iron, lead, and tellurium.

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

bohdanowiczite
A trigonal-hexagonal scalenohedral lead gray mineral containing bismuth, selenium, and silver.

bokite
A monoclinic-prismatic black mineral containing aluminum, hydrogen, iron, oxygen, and vanadium.

boldyrevite
An amorphous mineral containing aluminum, calcium, fluorine, hydrogen, magnesium, oxygen, and sodium.

boleite
An isometric-hexoctahedral mineral containing chlorine, copper, hydrogen, lead, oxygen, potassium, and silver.

bolidenite
Synonym of boulangerite.

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

bolivianite
Synonym of ametrine.

boltonite
forsterite

boltwoodite
A monoclinic-sphenoidal mineral containing hydrogen, oxygen, potassium, silicon, and uranium.

bombiccite
Synonym of hartite.

bombsies
In children's games of marbles, the mode of play where one player attempts to drop a marble from above in order to hit a marble on the ground.

bonattite
A monoclinic-domatic blue mineral containing copper, hydrogen, oxygen, and sulfur.

bonce
A large marble of grey stone used in various games, such as bonce about, bonce-eye, and French bonce.
A marble game played with bonces.
The human head.

bonces
plural of bonce

bonchevite
A orthorhombic mineral containing lead, bismuth, copper and sulphur.

bonshtedtite
A monoclinic-prismatic mineral containing carbon, iron, oxygen, phosphorus, and sodium.

boothite
A monoclinic-prismatic blue mineral containing cobalt, copper, hydrogen, magnesium, manganese, oxygen, sulfur, and zinc.