Man Made Glass (Not A Natural Rock Or Mineral)

Smoky Quartz (with Druzy/Polished Edge)

Smoky Quartz (Silicon Dioxide, SiO2)

Smoky Quartz and Pyrite Cluster

Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)

Citrine

Silicon Dioxide (SiO2) with iron impurities

Pumice

Pumiceous rhyolite / Volcanic glass

Quartz (Crystal/Druzy Quartz)

Quartz (SiO₂)

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite/Iron oxide inclusions

Green Jasper

Silicon Dioxide (SiO2) with impurities

Porphyritic Basalt (with Pyrolusite or Iron-oxide staining)

Porphyritic Basalt (Mafic Extrusive)

Green Apophyllite and Stilbite on Quartz Cluster

Apophyllite-(K) (KCa4(Si8O20)(F,OH)·8H2O), Stilbite-Ca (NaCa4(Si27Al9)O72·28H2O), Quartz (SiO2)

Quartz (likely a form of massive or vein quartz)

Quartz (SiO₂)

Epidote (likely Pistacite in Epidosite rock)

Epidote: Ca2(Al,Fe)3(SiO4)3(OH)

Peach Moonstone

Potassium Aluminum Silicate (KAlSi3O8)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Geode (Unopened)

Siliceous Geode (SiO2)

Sandstone

Arenite (primarily SiO2)

Amethyst

Silicon Dioxide (SiO2)

Bauxite (Laterite Clay)

Bauxite (mixture of Hydrous Aluminum Oxides: Gibbsite Al(OH)3, Boehmite and Diaspore AlO(OH))

Basalt with Vesicles

Vesicular Basalt (comprising Plagioclase Feldspar, Pyroxene, and Olivine)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Greenstone / Epidosite

Epidosite (Metasomatic rock consisting mainly of Epidite Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH) and Quartz)

Dyed Howlite

Borosilicate hydroxide (Ca2B5SiO9(OH)5)

Banded Agate (Onyx variety)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Tiger's Eye

Silicon dioxide (SiO2) with fibrous inclusions of crocidolite

Blue Calcite

Calcium Carbonate (CaCO3)

Water and Silt (Sedimentary Environment)

Suspended Sediment / H2O (dihydrogen monoxide)

Amethyst

Silicon Dioxide with trace inclusions of Iron (SiO2)

Pyrite

Iron Disulfide (FeS2)

Blue Chalcedony

Chalcedony (Silicon Dioxide, SiO2)

Lepidolite in Quartz (Lithium-bearing Ore)

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2) and Quartz (SiO2)

Green Aventurine

Aventurine Quartz (SiO2 with fuchsite inclusions)

Concretion

Various mineral compositions, typically carbonate or iron oxide cemented sediment

Green Aventurine

Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Jasper (Iron-stained Chert)

Silicon Dioxide (SiO2)

Conglomerate

Conglomerate (a clastic sedimentary rock)

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Coquina Jasper

Fossiliferous Chalcedony (SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Chert (specifically Jasper)

Silicon dioxide (SiO2) with iron oxide inclusions

Quartzite Pebble

Quartzite (primarily SiO2)

Chert (variations include Flint or Jasper)

Silicon Dioxide (SiO2)

Sandstone (Quartzose)

Arenite (primarily SiO2)