carborundum

noun 0.691

alumina

noun 0.654

sapphire

noun 0.637

almandine

noun 0.624

garnet

noun 0.613

andalusite

noun 0.589

chrysoberyl

noun 0.582

garnets

noun 0.580

tungsten carbide

noun 0.578

silicon carbide

noun 0.575

zircon

noun 0.575

onyx

noun 0.573

rutile

noun 0.571

coralline

noun 0.571

gemstone

noun 0.564

precious stone

noun 0.564

carbide

noun 0.564

chromite

noun 0.563

spinel

noun 0.562

alunite

noun 0.562

anorthite

noun 0.561

kyanite

noun 0.561

opal

noun 0.559

calcite

noun 0.559

pyrope

noun 0.558

sapphirine

noun 0.556

crystal

noun 0.555

aluminosilicate

noun 0.552

coral

noun 0.552

orthoclase

noun 0.552

albite

noun 0.551

rhodochrosite

noun 0.549

aragonite

noun 0.548

rhodonite

noun 0.547

precious coral

noun 0.545

hardstone

noun 0.544

obsidian

noun 0.544

zirconia

noun 0.543

boron carbide

noun 0.543

granite

noun 0.542

alum

noun 0.541

aluminium nitride

noun 0.541

quartzite

noun 0.539

boride

noun 0.538

hematite

noun 0.536

ruby

noun 0.534

carnelian

noun 0.534

topaz

noun 0.533

iridium

noun 0.533

corneum

noun 0.533

beryl

noun 0.532

realgar

noun 0.531

alexandrite

noun 0.531

abrasive

noun 0.529

aluminum

noun 0.529

tourmaline

noun 0.528

titanium

noun 0.527

tungsten

noun 0.527

azurite

noun 0.527

ruthenium

noun 0.527

rock candy

noun 0.525

diamonds

noun 0.525

zirconium

noun 0.524

granophyre

noun 0.522

peridot

noun 0.522

spodumene

noun 0.522

rhodium

noun 0.521

adularia

noun 0.521

cristobalite

noun 0.521

bauxite

noun 0.520

aluminium

noun 0.520

sardius

noun 0.519

amethyst

noun 0.519

cornea

noun 0.519

diamond

noun 0.517

single crystal

noun 0.517

rhinestone

noun 0.516

sardonyx

noun 0.514

anthracite

noun 0.514

polycrystal

noun 0.514

silica

noun 0.514

sillimanite

noun 0.513

cinnabar

noun 0.513

orthosilicate

noun 0.513

porphyry

noun 0.513

sodalite

noun 0.512

granulite

noun 0.512

potassium feldspar

noun 0.512

titanium oxide

noun 0.511

marble

noun 0.511

alizarin

noun 0.511

novaculite

noun 0.511

orthopyroxene

noun 0.511

wolframite

noun 0.510

cryptocrystalline

noun 0.510

cuprite

noun 0.509

alabaster

noun 0.509

sanidine

noun 0.509

laterite

noun 0.507

fluorite

noun 0.506