Mineral (Processed Metal)

Sandstone

Arenite (composed primarily of SiO2)

Yellow Aventurine (specifically a carved crescent moon)

Silicon Dioxide (SiO2) with inclusions

Fired Clay Brick (Anthropic Rock substitute)

Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)

Lapis Lazuli

Sodalite-rich metamorphic rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2

Ferruginous Quartz (Carnelian-tinted Quartz)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Slate

Foliated low-grade metamorphic rock

Ferruginous Sandstone (Ironstone)

Arenite with Limonite/Goethite cement

Tiger's Eye

Pseudomorph of Macrocrystalline Quartz after Crocidolite (SiO2)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Phantom Quartz (Chlorite Inclusion)

Silicon Dioxide (SiO2) with Chlorite (Mg,Fe,Al)6(Si,Al)4O10(OH)8

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Amazonite

K(AlSi3O8) - Potassium Aluminum Silicate

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Blue Calcite

Calcium Carbonate (CaCO3)

Tiger's Eye (Multicolor/Variegated)

Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxides)

Quartz (Milky/Smoky variety on matrix)

Silicon Dioxide (SiO2)

Gold (in Opaque Matrix/Jewelry)

Native Gold (Au)

Gold-Bearing Quartz

Auriferous Quartz (SiO2 with native Au)

Ferruginous Quartz

SiO2 (Silicon Dioxide) with Iron Oxide inclusions (FeO(OH) / Fe2O3)

Gold Ore

Native Gold (Au) in Matrix

Gold Nugget

Native Gold (Au)

Barite Rose on Marcasite

Barium Sulfate (BaSO4) on Iron Sulfide (FeS2)

Rhodonite

Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3

Pyrite in Quartz

Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Sandstone (Quartzose)

Arenite (primarily SiO2)

Gneiss

Gneiss (a rock type, not a specific mineral with a formula)

Pearl

Calcium Carbonate (Aragonite) with Conchiolin; formula: CaCO3

Quartz with Iron Staining

Silicon Dioxide (SiO2) with Ferruginous Oxides

Okenite (in Zeolite matrix)

Okenite (CaSi2O5 · 2H2O)

Magnetite (Lodestone variety)

Magnetite (Fe3O4)

Unakite

Epidotized Granite

Tiger's Eye

Silicon Dioxide (SiO2) with Limonite/Goethite pseudomorphs after Crocidolite

Limonite (Iron Ore)

FeO(OH)·nH2O (Hydrous ferric oxide)

Quartz (Milky or Smoky Quartz)

Silicon Dioxide (SiO2)

Blue Calcite

Calcium Carbonate (CaCO3)

Pyrite with Limonite/Goethite Alteration (Pseudomorph)

Iron Sulfide (FeS2) transitioning to Hydrated Iron Oxides (FeO(OH)·nH2O)

Gold Nugget

Native Gold (Au)

Quartz Crystal with Inclusions

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Concrete

Anthropogenic Sedimentary Rock (Hydrated Calcium Silicate)