Sedimentary Rock Or Mineral (Depending On Origin And Purity)

Chert (containing fossil leaf impression)

Microcrystalline silicon dioxide (SiO2)

Chert

Chert (microcrystalline quartz, SiO2)

Peacock Ore (Bornite or Iridescent Chalcopyrite)

Bornite (Cu5FeS4) or Chalcopyrite (CuFeS2) with oxidation

Quartz Vein Outcrop

Silicon Dioxide (SiO2)

Coarse-grained Quartz with Feldspar inclusions

Crystalline Quartz (SiO2) with Orthoclase/Plagioclase Feldspar inclusions

Aquamarine

Beryl (Be3Al2Si6O18 with iron impurities)

Green Aventurine

Silicon Dioxide (SiO2) with Chromium-rich Fuchsite mica

Jasper (likely a variety of Brecciated Jasper or a patterned variety)

Silicon dioxide (SiO2)

Shale (Beach-worn)

Laminated Pelite (primarily clay minerals and quartz)

Ocean Jasper

Orbicular Jasper (Silicon Dioxide with impurities), SiO2

Iron-Stained Quartz (Riverside Cobble)

Silicon Dioxide (SiO2) with Limonite/Hematite inclusions

Zinc Ore (Sphalerite in Matrix)

Sphalerite (Zn,Fe)S within a carbonate or silicate host rock

Sandstone

Quartz Arenite (a common type of sandstone, given the appearance), Arkose, Greywacke (depending on mineralogy)

Quartz (possibly milky quartz)

Quartz (Silica; SiO₂)

Carnelian (a variety of Chalcedony)

SiO2 (Silicon Dioxide with Iron Oxide impurities)

Moss Agate

Silicon Dioxide (SiO2) with inclusions

Ironstone Concretion (likely)

Goethite/Hematite/Limonite cemented sediment

Granite

Phaneritic Intrusive Igneous Rock (Granite)

Garnet in Matrix (likely Almandine in Quartz/Mica Schist)

Almandine Garnet (Fe3Al2(SiO4)3) in Quartz-Feldspar host rock

Botryoidal Chalcedony (Druzy Quartz)

Silicon Dioxide (SiO2)

Magnetite Sand (Black Sand)

Magnetite (Fe3O4)

Laterite

Laterite (no specific mineral formula as it's a rock type)

Rose Quartz

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

Milky Quartz (with Iron staining)

Silicon Dioxide (SiO2)

Rose Quartz

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Amethyst

SiO2 (Silicon Dioxide)

Quartz Pebble

Silicon Dioxide (SiO2)

Chalcedony / Agate

Silicon Dioxide (SiO2)

Rough Emerald/Green Beryl

Beryl (Be3Al2(SiO3)6) with trace amounts of Chromium or Vanadium

Chalk

Calcium Carbonate (CaCO3)

Sulfur (with possible Cullet Glass or Slag imitation)

Native Sulfur (S8)

Pyrite

Pyrite (FeS2)

Quartzite

Quartzite (SiO2)

Galena

Lead Sulfide (PbS)

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Smoky Quartz (Tumbled)

Silicon Dioxide (SiO2)

Quartz (Specifically Clear to Smoky Quartz point)

Silicon Dioxide (SiO2)

Rose Quartz

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

Ferruginous Sandstone (Ironstone)

Arenite with Iron-Oxide Cement (FeO(OH)·nH2O / Fe2O3)

Rhodonite

Rhodonite (MnSiO3)

Andesite

Andesite (Intermediate Extrusive Volcanic Rock)