Gemstones and Gem Cuts


 * agate
 * agglomerate
 * alexandrite
 * alluvium
 * almandine
 * amber
 * amethyst
 * amorzonite
 * amygdule
 * andradite
 * anthracite
 * anticline
 * aquamarine
 * aquifer
 * aventurine
 * basalt
 * batholith
 * bedrock
 * beryl
 * bitumen
 * bloodstone
 * boulder train
 * breccia
 * cairngorm
 * carat
 * carbonaceous
 * carbuncle
 * carnelian
 * cat's eye
 * chalcedony
 * chemical weathering
 * chert
 * chrysoberyl
 * chrysolite
 * chrysoprase
 * citrine
 * conglomerate
 * country rock
 * demantoid
 * diamond
 * drift
 * drumlin
 * druse
 * emerald
 * erratics
 * esker
 * extrusive
 * fault
 * fire opal
 * flint
 * fold
 * fool's gold
 * garnet
 * gastrolith
 * geode
 * girasol
 * glacial pavement
 * granite
 * harlequin opal
 * heliotrope
 * humus
 * hyacinth
 * igneous rock
 * intrusive
 * jacinith
 * jade
 * jasper
 * jet
 * karst
 * kunzite
 * lapidary
 * lapilli
 * lapis lazuli
 * lazurite
 * limestone
 * loess
 * malachite
 * marble
 * matrix
 * melanite
 * metamorphic rock
 * milky quartz
 * moonstone
 * morganite
 * nephrite
 * obsidian
 * oil shale
 * olivine
 * onyx
 * oolites
 * opal
 * ore
 * outcrop
 * overburden
 * Pele's hair
 * peridot
 * petrify
 * petroglyph
 * petrology
 * petrous
 * placer deposit
 * pumice
 * pyroclastic
 * pyrope
 * red jasper
 * riprap
 * rose quartz
 * rubasse
 * ruby
 * rutile
 * sandstone
 * sapphire
 * sard
 * sardonyx
 * sedimentary rock
 * silica
 * smoky quartz
 * smoky topaz
 * sodalite
 * spinel
 * star sapphire
 * strata
 * stratification
 * striation
 * sunstone
 * tiger's-eye
 * till
 * topaz
 * tourmaline
 * tuff
 * turquoise
 * vein
 * ventifact
 * white sapphire
 * zircon