Mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Copper Ore with Malachite and Chrysocolla

Cu2CO3(OH)2 (Malachite) with Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla)

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Diamond

Natural Carbon (C)

Milky Quartz

Silicon Dioxide (SiO2)

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Blue Agate (Dyed Chalcedony)

Silicon Dioxide (SiO2)

Rough Dark Green Sapphire

Corundum (Al2O3)

Blue Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions of asbestiform silicates)

Granodiorite

Granodiorite (containing Plagioclase, Quartz, and Biotite)

Granite Cobble

Granite (Phaneritic igneous rock composed of Quartz, Feldspar, and Mica)

Serpentinite

Serpentinite (complex silicate minerals including lizardite, chrysotile, and antigorite: (Mg,Fe)3Si2O5(OH)4)

Fossilized Angel Wing Shell

Cyrtopleura costata

Granodiorite Pebble

Granodiorite (containing Quartz, Plagioclase Feldspar, and Biotite/Amphibole)

Sandstone (Red Arkose)

Sandstone (Arkose variant, primarily SiO2 with KAlSi3O8)

Lunar Meteorite (Feldspathic Breccia)

Achondrite, Lunar Meteorite (Feldspathic Breccia)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

Granodiorite Pebble

Granodiorite

Granite

Granite (Felsic Plutonic Rock)

Serpentinite (often called Jade or Nephrite substitute)

Serpentinite (composed primarily of Antigorite, Lizardite, or Chrysotile)

Fossilized Megalodon Tooth Fragment

Otodus megalodon (Carcharocles megalodon fossil)

Serpentine (Nephrite-like River Cobble)

Serpentinite (Hydrous Magnesium Iron Silicate)

Amygdaloidal Rhyolite

Rhyolite (felsic volcanic rock) with amygdules

Basalt (with possible quartz veinsing)

Basalt

Granite

Granite (composed primarily of Quartz SiO2, Orthoclase KAlSi3O8, and Plagioclase NaAlSi3O8 to CaAl2Si2O8)

River Quartzite Siltstone

Quartz-rich Meta-siltstone (SiO2 dominated)

River Cobble (Gneiss/Migmatite)

Gneissic Metamorphic Rock (composed mainly of Quartz, Feldspar, and Biotite)

Blue Slag Glass

Amorphous Silica (Byproduct of smelting)

Gneiss (Metamorphic Rock)

Gneiss

Kimberlite with Diamond

Kimberlite (Porphyritic Peridotite)

Diorite (Polished Cobble)

Diorite (Intermediate intrusive igneous rock)

Diorite (River Pebble)

Intermediate plutonic igneous rock

Pink Granite

Phaneritic plutonic rock (dominated by Alkali Feldspar)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Milky Quartz (Water-worn Pebble)

Silicon Dioxide (SiO2)

Limonite and Goethite encrusted Quartz (Iron-stained Gossan)

FeO(OH)·nH2O (Limonite) / FeO(OH) (Goethite) on SiO2 (Quartz)

Specular Hematite (Iron Ore)

Iron(III) oxide (Fe2O3)

Diamond (in a cluster setting)

Crystallized Carbon (C)

Quartz Vein in Sedimentary Matrix

Silicon Dioxide (SiO2) with host rock

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)