Minerals

Schist (Garnet-Mica Schist)

Garnet-Mica Schist (X-Y)3Z2(SiO4)3

Quartzite with Chlorite/Epidote

Metamorphosed Quartzite (SiO2)

Dragon Blood Jasper

Epidote with Pietersite or Red Jasper (Ca2Al2Fe3+[Si2O7][SiO4]O(OH))

Quartz (Milky or Common Quartz)

Silicon Dioxide (SiO2)

Olivine/Peridot

Magnesium Iron Silicate (Mg,Fe)2SiO4

Marble

Metamorphosed Limestone (CaCO3)

Chert (Flint variety)

Chert (Cryptocrystalline variety of Quartz, SiO2)

Rose Quartz

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

Agate (Beads)

Silicon Dioxide (SiO2)

Greenstone or Epidote-rich rock

Epidote or Chlorite schist/greenstone

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Strawberry Quartz

Quartz with Hematite or Goethite inclusions (SiO2 + inclusions)

Petrified Wood

Silicified Wood (SiO2)

Chert (Flint) Pebble

Microcrystalline Quartz (SiO2)

Iridium sand or Osmium-Iridium nugget

Iridosmine / Osmiridium (Platinoid grouping)

Marble

Recrystallized Calcite (CaCO3)

Green Jasper

Jasper (Silicon Dioxide, SiO2)

Tufa

Calcareous Tufa (CaCO3)

Yellow Aventurine (or Citrine-colored Quartz)

Silicon Dioxide (SiO2) with inclusions

Travertine (Calcareous Tufa)

Calcium Carbonate (CaCO3)

Ferruginous Sandstone Concretion (Ironstone Phosphorite)

Ferruginous Sandstone (variable Fe-oxide/hydroxide composition)

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Ironstone Concretion (Moqui Marble)

Iron Oxide Concretion (Goethite and Hematite around a Sandstone core)

Garnet Schist

Almandine-Garnet Schist

Rose Quartz

Silicon Dioxide with trace inclusions (SiO2)

Ironstone with Limonite/Goethite coating

Ferruginous Sedimentary Rock (contains Limonite FeO(OH)·nH2O)

Turquoise

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

Quartz Pebble

Quartz (Silicon Dioxide - SiO2)

Limonite Stained Basalt

Hydrated Iron Oxide on Mafic Volcanic Rock (FeO(OH)·nH2O)

Schist

Mica Schist

Granite

Phaneritic Igneous Rock (Granite)

Siltstone

Siltstone (primarily SiO2 with clay minerals)

Siltstone with Sandstone Bands

Siltstone (composed of Quartz and Clay minerals)

Blue Lace Agate

Cryptocrystalline Quartz (SiO2) with trace minerals

Iron Meteorite (Individual)

Siderite (composed of Kamacite and Taenite minerals)

Blue Lace Agate

Cryptocrystalline Quartz (SiO2) with trace minerals

Dalmation Stone

Peralkaline Rock (mixed silicate minerals)

Siltstone or Fine-grained Sandstone pebble

Siltstone (primarily SiO2 with clay minerals)

Basalt with Amygdaloidal Infilling

Porphyritic or Amygdaloidal Basalt

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Amygdaloidal Rhyolite

Amygdaloidal felsic extrusive rock

Asphalt Concrete

Bituminous Concrete (Anthropic Rock)