Minerals

Turquoise

Turquoise (CuAl6(PO4)4(OH)8·4H2O)

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Turquoise with Pyrite

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O] with Iron Pyrite (FeS2)

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Dalmatian Stone

Dalmatian Jasper (a misnomer for an Aplite with Arfvedsonite spots)

Magnetite

Magnetite (Fe3O4)

Sandstone (likely Arkosic)

Arenite (SiO2 based)

Malachite Coating on Host Rock

Malachite [Cu2CO3(OH)2]

Turquoise

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

Sandstone (likely Arkose or Lithic)

Clastic sedimentary rock (SiO2 + impurities)

Sandstone (Ferruginous)

Arenite with Iron Oxides

Granite Glacial Erratic

Intrusive Phaneritic Felsic Rock (Granite)

Greenschist (Chlorite Schist)

Greenschist (Metamorphic rock dominated by chlorite, actinolite, and epidote)

Mica Schist

Mica Schist (primarily Muscovite or Biotite sheet silicates)

Quartz Druzy (Geode Fragment)

Silicon Dioxide (SiO2)

Snowflake Obsidian

Spherulitic Obsidian (primarily SiO2 with Cristobalite inclusions)

Geode (Unopened)

SiO2 (Quartz-filled Sedimentary Nodule)

Fulgurite

Fulgurite (Lechatelierite-rich variety)

Chrysocolla

Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4·nH2O

Veined Limestone (Micrite) with Quartz/Calcite Veins

Calcium Carbonate (CaCO3) with Silicate or Carbonate inclusions

Fossilized Shark Teeth

Carcharhiniformes or Lamniformes species (common mineral: Fluorapatite/Ca5(PO4)3F)

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Diamond

Carbon (C)

Limonite (Iron Ore)

Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)

Granite Pebble (Salt and Pepper Granite)

Phaneritic Felsic Igneous Rock (primarily Quartz, Feldspar, and Biotite/Amphibole)

Gneiss

High-grade foliated metamorphic rock

Greenstone

Greenschist / Meta-basalt

Vesicular Basalt (or Scoria)

Vesicular Basalt

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Chert (Jasper/Flint variety)

Sedimentary silica (SiO2)

Green Schist

Greenschist (Chlorite Schist)

Nephrite Jade

Ca2(Mg,Fe)5Si8O22(OH)2

Obsidian

Volcanic Glass (70% or more SiO2)

Magnetite

Magnetite (Fe3O4)

Slate

Slate (foliated metamorphic rock)

Labradorite (in Larvikite or Gabbro)

Plagioclase Feldspar (containing (Ca, Na)(Al, Si)4O8)

Chert (with Quartz Veining)

Microcrystalline Quartz (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Olivine (Peridotite)

(Mg,Fe)2SiO4 (Magnesium Iron Silicate)

Obsidian

Volcanic glass (mainly SiO2 with inclusions)

Chert (Flint)

Silicon dioxide (SiO2)

Slate

Slate (foliated metamorphic rock)