Sedimentary Or Igneous (Secondary Formation)

Pyrite

Pyrite (FeS2)

Lapis Lazuli

Lapis Lazuli (a rock composed primarily of Lazurite)

Pyrite (or Fool's Gold)

Pyrite (FeS₂)

Milky Quartz

Silicon Dioxide (SiO2)

Blue Sapphire

Corundum (Al2O3 with trace Titanium and Iron)

Ruby (Corundum)

Al2O3 (Aluminium oxide with Chromium impurities)

Blue Sapphire

Corundum (Al2O3 - Aluminum Oxide)

Milky Quartz

Quartz / Silicon Dioxide (SiO2)

Quartz

SiO₂ (Silicon Dioxide)

Black Obsidian

Volcanic Glass (SiO2)

Banded Rock (likely Quartz-rich)

Uncertain, likely a Metamorphic Rock (e.g., Gneiss or Schist) with prominent Quartz and other minerals

Mica (likely Muscovite)

Muscovite / KAl2(AlSi3O10)(OH)2

Pyrite

Iron Sulfide (FeS2)

Jasper or Chert

Silicon Dioxide (SiO2)

Veined Limestone (Micrite) with Quartz/Calcite Veins

Calcium Carbonate (CaCO3) with Silicate or Carbonate inclusions

Chert (Jasper/Chalcedony variety)

Silicon Dioxide (SiO2)

Banded Agate

Sedimentary Cryptocrystalline Quartz (SiO2)

Milky Quartz

Quartz (SiO2)

Basalt with Amygdaloidal Inclusions

Aphanitic Mafic Volcanic Rock (Basalt)

Quartz-veined Basalt

Amygdaloidal or Porphyritic Basalt with Silicon Dioxide (SiO2) vein

Quartz

Quartz (SiO₂)

Travertine

Terrestrial Sedimentary Limestone (CaCO3)

Chert (Pink Jasper variant)

Microcrystalline Quartz (SiO2)

Limonite (Iron Ore)

Goethite and related iron hydroxides (FeO(OH)·nH2O)

Garnet Schist or Garnet-bearing Quartzite

Metamorphic rock containing Almandine Garnet (Fe3Al2(SiO4)3) and Quartz (SiO2)

Scoria

Scoria (a vesicular basalt or andesite)

Limonite/Goethite on Shale

Hydrous ferric oxides (FeO(OH)·nH2O) often associated with argillaceous rock

River Stone / Pebble

Clastic Sediment (composed largely of Quartz, Feldspar, and various rock fragments)

Rose Quartz

Silicon Dioxide (SiO2)

Basalt with Jasper Veining

Basaltic Rock with Cryptocrystalline Quartz (SiO2)

Basalt with Plagioclase Microphenocrysts

Amygdaloidal or Porphyritic Basalt

Basalt with Iron Oxidation (Lattice/Veined)

Mafic Volcanic Rock (principally Plagioclase and Pyroxene)

Amygdaloidal Basalt

Amygdaloidal Basalt

Amygdaloidal Basalt with Quartz/Calcite Inclusions

Amygdaloidal Basalt (SiO2 / CaCO3 inclusions)

Black Tourmaline (Schorl)

Schorl (Sodium iron silicate hydroxide boron silicate); NaFe3Al6(BO3)3Si6O18(OH)4

Quartz (White or Milky Quartz Pebble)

Quartz (Silicon Dioxide, SiO2)

Amygdaloidal Basalt with Epidote/Chlorite

Basalt (containing (Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH)))

Vesicular Basalt (Scoria)

Basalt (Extrusive Igneous Rock)

Turquoise

Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O

Garnet (likely Almandine, Pyrope, or a blend)

Garnet group minerals: X3Y2(SiO4)3, where X and Y represent various metal ions (e.g., Almandine: Fe3Al2(SiO4)3, Pyrope: Mg3Al2(SiO4)3)

Chalk

Carbonate rock (mainly CaCO3)

Sandstone

Arenite (primarily SiO2)