Metamorphic Rock (Specifically A Rock Composed Of Minerals)

Limestone (specifically Dolomitic Limestone)

Calcium Magnesium Carbonate (CaMg(CO3)2)

Yellow Apatite Sphere (Polished)

Fluorapatite / Ca5(PO4)3F

Gneiss (specifically a water-worn pebble)

Gneiss

Grey River Stone (Quartz-rich Quartzite/Siltstone)

Quartzite / Meta-siltstone (primarily SiO2)

Folded Schist / Gneiss (Metamorphic Rock)

Regional Metaphoric Folded Outcrop (predominantly Schist/Gneiss)

Clear Quartz

Silicon dioxide (SiO2)

Gneiss (High-grade Metamorphic Rock)

Gneiss (Metamorphic silicate rock)

Quartz (likely tumbled or naturally water-worn)

Quartz (SiO₂ - Silicon Dioxide)

Porphyry (specifically Porphyritic Basalt or Andesite)

Porphyritic extrusive igneous rock (Mg,Fe)2SiO4 (Olivine inclusions/Plagioclase Feldspar)

Quartz (Clear / Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (specifically Citrine or Yellow Quartz)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Fuchsite

K(Al,Cr)2(AlSi3O10)(OH)2 (Chromium-rich Muscovite)

White Jade / White Chalcedony

Nephrite Jade (Ca2(Mg,Fe)5Si8O22(OH)2) or Chalcedony (SiO2)

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Lapis Lazuli

Lapis Lazuli (a rock type, not a single mineral; main component is Lazurite (Na,Ca)8[(S,Cl,SO4,OH)2|(Al6Si6O24)])

Tiger's Eye (Brown/Dark variety)

Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)

Tiger's Eye

Silicon dioxide (SiO2) with fibrous inclusions of crocidolite

Quartz (in a rock matrix)

Quartz (SiO2)

Basalt (Amygdaloidal)

Amygdaloidal Basalt

Quartz (Specifically Clear to Smoky Quartz point)

Silicon Dioxide (SiO2)

Basalt

Basalt (primarily composed of Plagioclase feldspar and Pyroxene)

Basalt

Basalt (Mafic volcanic rock)

Green Chert (Jasper)

Silicon Dioxide (SiO2)

Goethite

Goethite (FeO(OH))

Pumice (Volcanic Rock)

Vesicular volcanic rock (composed largely of amorphous volcanic glass)

Agate (specifically, multi-colored or pastel-dyed agate)

Silicon dioxide (SiO2) - specifically, a cryptocrystalline variety of quartz known as Chalcedony, with banding classified as Agate. (If it were Fluorite, the chemical formula would be Calcium Fluoride - CaF2).

Basalt (Vesicular)

Extrusive mafic igneous rock; primarily (Ca, Na)(Mg, Fe, Al)(Si, Al)2O6 with (Ca, Na)(Al, Si)4O8

Nephrite Jade

Ca2(Mg, Fe)5Si8O22(OH)2

Marble

Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)

Ruby in Fuchsite

Corundum (Al2O3) in Fuchsite (K(Al,Cr)3Si3O10(OH)2)

Green Aventurine

Aventurine (variety of Quartz - SiO2)

Specular Hematite

Specularite (Fe2O3)

Bauxite

Bauxite (Mixture of Hydrous Aluminum Oxides)

Soapstone

Steatite (composed primarily of Talc: Mg3Si4O10(OH)2)

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Quartz (specifically Milky or Clear Quartz)

Silicon Dioxide (SiO2)

Gneiss (specifically Banded Gneiss)

Gneiss

Limonite (Iron Ore)

Limonite (Hydrous iron(III) oxide-hydroxide mixture, primarily FeO(OH)·nH2O)

Diorite

Phaneritic intermediate plutonic rock

Jadeite Jade

NaAlSi2O6 (Sodium Aluminum Silicate)