pyrrhotite

noun 0.754

iron sulphide

noun 0.720

marcasite

noun 0.696

siderite

noun 0.634

magnetite

noun 0.633

chalcopyrite

noun 0.630

bornite

noun 0.620

arsenopyrite

noun 0.618

iron

noun 0.609

pig iron

noun 0.602

ferrihydrite

noun 0.599

pyritization

noun 0.596

limonite

noun 0.596

fluorite

noun 0.595

hematite

noun 0.593

iridium

noun 0.592

pyrolusite

noun 0.590

sulfur

noun 0.588

iron meteorite

noun 0.582

iron oxide

noun 0.579

ferritin

noun 0.579

ilmenite

noun 0.578

pyrophyllite

noun 0.577

ferrite

noun 0.577

sulphur

noun 0.570

ferrous oxide

noun 0.567

ferric oxide

noun 0.567

goethite

noun 0.565

sulphide

noun 0.564

black iron

noun 0.562

pyrope

noun 0.560

iron carbide

noun 0.559

pyromorphite

noun 0.559

tetrahedrite

noun 0.558

sulfide

noun 0.557

fluorspar

noun 0.555

peridot

noun 0.554

pentlandite

noun 0.552

olivine

noun 0.552

porphyry

noun 0.546

pyrochlore

noun 0.546

chromite

noun 0.546

bog iron

noun 0.545

biotite

noun 0.545

ferroin

noun 0.543

gypsum

noun 0.542

pyr

noun 0.541

quartzite

noun 0.537

ferrous sulfate

noun 0.537

uranium

noun 0.537

fir

noun 0.535

sphalerite

noun 0.534

iron-sulfur protein

noun 0.533

perlite

noun 0.533

thermite

noun 0.532

copper ore

noun 0.531

bar iron

noun 0.530

fayalite

noun 0.530

pyrrole

noun 0.530

phosphorite

noun 0.528

gold mine

noun 0.527

anthophyllite

noun 0.525

citrine

noun 0.524

fluorine

noun 0.521

fossil

noun 0.521

bronzite

noun 0.520

gold

noun 0.520

graphite

noun 0.520

ferrum

noun 0.519

cast iron

noun 0.519

flint

noun 0.519

illite

noun 0.519

pumice

noun 0.518

barite

noun 0.518

ferric sulphate

noun 0.517

stibnite

noun 0.517

plutonium

noun 0.517

cuprite

noun 0.517

fossil fuel

noun 0.516

ironstone

noun 0.514

anhydrite

noun 0.514

pyre

noun 0.514

pyro

noun 0.513

firepit

noun 0.513

galena

noun 0.511

mineral

noun 0.510

meteorite

noun 0.510

pyrene

noun 0.509

phyllite

noun 0.508

antimonite

noun 0.508

sulfite

noun 0.508

mica

noun 0.507

zircon

noun 0.507

jarosite

noun 0.507

wolframite

noun 0.506

maghemite

noun 0.506

iron gray

noun 0.505

ferromagnet

noun 0.505

siderophile

noun 0.504

pewter

noun 0.503