plumbopyrochlore
An isometric-hexoctahedral mineral containing calcium, hydrogen, iron, lead, niobium, oxygen, silicon, tantalum, uranium, and yttrium.

plumbotellurite
An orthorhombic mineral containing lead, oxygen, and tellurium.

plumbotsumite
An orthorhombic-disphenoidal colorless mineral containing hydrogen, lead, oxygen, and silicon.

plumosite
jamesonite.

pluton
A body of igneous rock formed beneath the surface of the earth by consolidation of magma

plutons
plural of pluton

poenamu
Alternative form of pounamu (“greenstone”).

poikiloblast
A porphyroblast mineral containing small inclusions of the previous rock.

poikiloblasts
plural of poikiloblast

poitevinite
A triclinic-pinacoidal mineral containing copper, hydrogen, iron, oxygen, sulfur, and zinc.

pokrovskite
A monoclinic-prismatic mineral containing carbon, hydrogen, magnesium, and oxygen.

poldervaartite
An orthorhombic-dipyramidal mineral containing calcium, hydrogen, manganese, oxygen, and silicon.

polhemusite
A tetragonal-dipyramidal black mineral containing mercury, sulfur, and zinc.

poliopyrite
Synonym of marcasite.

polkanovite
A hexagonal-dipyramidal gray mineral containing arsenic and rhodium.

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

polluxite
pollux

polyadelphite
A pale brown andradite garnet

polyadelphites
plural of polyadelphite

polyargite
muscovite

polyargites
plural of polyargite

polyarsenite
The mineral sarkinite

polybasite
A black ore consisting of silver, sulfur, and antimony, with some copper and arsenic.

polybasites
plural of polybasite

polycarbon
polymeric carbon (such as graphite or graphene)

polyphite
A mineral containing sodium, calcium, titanium, silicon, oxygen, phosphorus and fluorine, found in Russia.

polyquartz
A polycrystalline quartz.

polytelite
Synonym of freibergite.

polzenite
A melilitite that contains haüyne.

polzenites
plural of polzenite

ponomarevite
A monoclinic-prismatic orange red mineral containing chlorine, copper, oxygen, and potassium.

porcelainite
Synonym of mullite.

porcelainites
plural of porcelainite

porcelanite
A semivitrified clay or shale, somewhat resembling jasper; porcelain jasper.

porcelanites
plural of porcelanite

porcellanite
Alternative form of porcelanite.

porcellanites
plural of porcellanite

porphyre
Obsolete form of porphyry.

porphyres
plural of porphyre

porphyries
plural of porphyry

porphyrite
Any porphyritic rock.

porphyroblast
A relatively large crystal within a metamorphic rock

porphyroblasts
plural of porphyroblast

porphyry
A hard igneous rock consisting of large crystals in a fine-grained matrix.
A hard igneous rock consisting of large crystals in a fine-grained matrix.

posnjakite
A particular mineral containing copper, sulphur, hydrogen, and oxygen.

potarite
A tetragonal-ditetragonal dipyramidal silver white mineral containing mercury and palladium.

potassicchlorohastingsite
Alternative form of potassic-chloro-hastingsite.

potassichastingsite
Alternative form of potassic-hastingsite.

potassicleakeite
A monoclinic-prismatic reddish brown mineral containing hydrogen, iron, lithium, magnesium, manganese, oxygen, potassium, silicon, sodium, and vanadium.

potassicpargasite
A monoclinic-prismatic black mineral containing calcium, fluorine, hydrogen, iron, magnesium, oxygen, potassium, silicon, and sodium.

potassicsadanagaite
A monoclinic mineral containing aluminum, calcium, hydrogen, iron, oxygen, potassium, silicon, and sodium.

potosiite
A triclinic-pinacoidal white mineral containing antimony, iron, lead, sulfur, and tin.

potstone
A variety of steatite sometimes manufactured into culinary vessels.

potstones
plural of potstone

pottsite
A tetragonal-trapezohedral bright yellow mineral containing bismuth, hydrogen, lead, oxygen, and vanadium.

poubaite
A trigonal-hexagonal scalenohedral silver white mineral containing bismuth, lead, selenium, sulfur, and tellurium.

poudretteite
A hexagonal-dihexagonal dipyramidal mineral containing boron, oxygen, potassium, silicon, and sodium.

poughite
An orthorhombic-dipyramidal mineral containing hydrogen, iron, oxygen, sulfur, and tellurium.

pounamu
Jade, nephrite.

pouzacite
Synonym of leuchtenbergite.

povondraite
A trigonal-ditrigonal pyramidal black mineral containing aluminum, boron, hydrogen, iron, magnesium, oxygen, potassium, silicon, and sodium.

poyarkovite
A monoclinic-prismatic white mineral containing chlorine, mercury, and oxygen.

prase
A variety of cryptocrystalline of a green colour.
A variety of chalcedony, with a green color due to inclusions of actinolite or other iron-bearing minerals.

praseolite
A variety of altered iolite with a green colour and greasy lustre.

prases
plural of prase

prasines
plural of prasine

prasiolite
Synonym of vermarine.

prasiolites
plural of prasiolite

predazzite
A substance formed from dolomite by volcanic agency, once thought to be a distinct mineral species.

preisingerite
A triclinic-pinacoidal mineral containing arsenic, bismuth, hydrogen, and oxygen.

preiswerkite
A monoclinic-prismatic mineral containing aluminum, hydrogen, magnesium, oxygen, silicon, and sodium.

preobrazhenskite
An orthorhombic-dipyramidal mineral containing boron, hydrogen, magnesium, and oxygen.

pretilt
A deviation from the perpendicular in the orientation of the director of a liquid crystal.

pretilts
plural of pretilt

pretulite
A tetragonal-ditetragonal dipyramidal pale pink mineral containing oxygen, phosphorus, and scandium.

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

priderite
A tetragonal-dipyramidal mineral containing aluminum, barium, iron, oxygen, potassium, sodium, and titanium.

pringleite
A triclinic-pedial mineral containing boron, calcium, chlorine, hydrogen, and oxygen.

prismatine
An orthorhombic-dipyramidal mineral containing aluminum, boron, fluorine, hydrogen, iron, magnesium, oxygen, and silicon.

prismatines
plural of prismatine

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

propylite
A form of andesite modified by hydrothermal processes.

propylites
plural of propylite

prosperite
A monoclinic-prismatic mineral containing arsenic, calcium, hydrogen, oxygen, and zinc.

protasite
A monoclinic-domatic light orange mineral containing barium, hydrogen, oxygen, and uranium.

protoanthophyllite
An orthorhombic-dipyramidal mineral containing aluminum, hydrogen, iron, magnesium, manganese, nickel, oxygen, silicon, and sodium.

protodolomite
A mineral that (in the right conditions) will develop into dolomite

protodolomites
plural of protodolomite

protolith
The original precursor of any specified metamorphic rock

protoliths
plural of protolith

proudite
A monoclinic-prismatic silver gray mineral containing antimony, bismuth, copper, lead, selenium, silver, and sulfur.

proustite
A mineral, Ag₃AsS₃, often found with pyrargyrite in silver veins.

proustites
plural of proustite

psammite
Any sandstone, but most often a metamorphosed rock unit with a dominantly sandstone protolith

psammites
plural of psammite

pseudoboleite
A tetragonal-ditetragonal dipyramidal indigo blue mineral containing chlorine, copper, hydrogen, lead, and oxygen.

pseudobrookite
An orthorhombic-dipyramidal mineral containing iron, magnesium, oxygen, and titanium.

pseudocotunnite
An orthorhombic-dipyramidal mineral containing chlorine, lead, and potassium.

pseudogalena
sphalerite.

pseudograndreefite
An orthorhombic-disphenoidal colorless mineral containing fluorine, lead, oxygen, and sulfur.

pseudoheterosite
Synonym of sicklerite.

pseudojasper
A rock that resembles, but is not, jasper

pseudojaspers
plural of pseudojasper

pseudolaueite
A monoclinic-prismatic orange mineral containing hydrogen, iron, manganese, oxygen, and phosphorus.

pseudomalachite
A mineral containing copper, hydrogen, oxygen, and phosphorus.