Sedimentary Rock (Possibly Composed Of Various Minerals)

Granodiorite with Quartz Veining

Granodiorite (containing Plagioclase Feldspar, Quartz, and Biotite/Hornblende) with Quartz (SiO2) veins

Almandine Garnet

Almandine (Fe3Al2(SiO4)3)

Malachite

Copper carbonate hydroxide Cu2CO3(OH)2

Limonite with Quartz (Gossan)

Hydrated iron(III) oxide-hydroxide mixture (FeO(OH)·nH2O) with Silicon Dioxide (SiO2)

Limonite (Iron Ore)

Limonite (an FeO(OH)·nH2O mineraloid, not a true mineral due to variable composition)

Ferruginous Quartz (Carnelian-tinted Quartz)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Granite

Granite (Phaneritic intrusive igneous rock; primarily SiO2 and Al2O3)

Gneiss (specifically Pink Gneiss)

Gneiss (high-grade regional metamorphic rock)

Granite

Granite (Phaneritic Quartz-Feldspar Plutonic Rock)

Travertine (Calcareous Tufa)

Calcium Carbonate (CaCO3)

Grey River Stone (Quartz-rich Quartzite/Siltstone)

Quartzite / Meta-siltstone (primarily SiO2)

Mixed Mineral Specimens

Mixed Silicates, Oxides, and Phosphates (SiO₂, Ca₅(PO₄)₃(F,Cl,OH), Na₈Al₆Si₆O₂₄Cl₂, etc.)

Petrified Wood

Silicified Wood (SiO2)

Pyrite (on the right) and Magnetite or Hematite (on the left)

Iron Sulfide (FeS2) and Iron Oxide (Fe3O4 or Fe2O3)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Greenstone with Epidote or Quartz Vein

Epidiorite or Metabasalt (composed largely of Chlorite, Epidote, and Amphibole)

Moqui Marble (Shaman Stone)

Ironstone Concretion (Fe2O3) - primarily Hematite or Goethite shell with Sandstone core

Kambaba Jasper (Crocodile Jasper)

Stromatolite (Fossilized Algae)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Opal

Hydrated Amorphous Silica (SiO2·nH2O)

Chert (varietal: Jasper or Flint likely, but definitive identification is difficult from image)

SiO₂ (silicon dioxide)

Leopard Skin Jasper

Silicon Dioxide (SiO2) with various inclusions

River Cobble (Salt and Pepper Gneiss)

Gneiss (High-grade regional metamorphic rock)

Greenstone (Epidote/Chlorite Rich Rock)

Metabasalt (often contains Epidote Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH))

Ironstone (with Limonite/Goethite)

Ferruginous Sedimentary Rock (contains Limonite FeO(OH)·nH2O and Hematite Fe2O3)

Coral Fossil (Petrified Coral)

Scleractinia (Order) - Calcified Fossil Skeleton (CaCO3)

Ferruginous Chert (Jasper)

Silicon Dioxide (SiO2) with iron oxide inclusions

Septarian Nodule (Galt)

Calcareous concretion / Septarian concretion

Red Sandstone

Arenite (primarily SiO2 with hematite/iron oxide coating)

Greenstone

Greenschist (composed of actinolite, chlorite, and epidote)

Green Fluorite in Host Rock

Fluorite (Calcium Fluoride, CaF2)

Ferruginous Chert

Microcrystalline Quartz (SiO2) with Iron Oxides

Rhodochrosite

Manganese carbonate (MnCO3)

Basalt

Mafic extrusive volcanic rock (composed primarily of Plagioclase feldspar and Pyroxene)

Quartz Pebble

Silicon Dioxide (SiO2)

Basalt (Road Gravel)

Aphanitic mafic volcanic rock (various compositions of plagioclase feldspar and pyroxene)

Desert Rose (Baryte or Selenite variant)

Barium Sulfate (BaSO4) or Gypsum (CaSO4·2H2O) with Sand inclusions

Petrified Wood

Silicified Wood (SiO2)

Granite

Granite (composed primarily of Quartz SiO2, Alkali Feldspar KAlSi3O8, and Plagioclase)

Green Aventurine (Green Quartzite)

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

Granite

Phaneritic Plutonic Igneous Rock (Rich in SiO2)

Blue Apatite

Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)