Sedimentary Rock (Possibly Composed Of Various Minerals)

Diorite

Diorite (Intermediate intrusive igneous rock)

Sandstone

Arenite (primarily SiO2)

Quartzite

Quartzite (SiO2)

Basalt (Vesicular or Porphyritic)

Basalt (composed primarily of plagioclase feldspar, pyroxene, and olivine)

Sandstone with Quartz Veins

Arenite (primarily SiO2 with Fe2O3 staining)

Oolitic Limestone

Oolitic Limestone (Calcium Carbonate, CaCO3)

Chert Nodule

Microcrystalline Quartz (SiO2)

Pyrite with Calcite

Iron Disulfide (FeS2) with Calcium Carbonate (CaCO3)

Azurite and Malachite on Matrix

Azurite: Cu3(CO3)2(OH)2; Malachite: Cu2CO3(OH)2

Granodiorite

Phaneritic Plutonic Rock - Granodiorite

Tumbled Obsidian (possibly Mahogany Obsidian variant)

Volcanic Glass (Amorphous Silicon Dioxide, SiO2)

White Jade / White Chalcedony

Nephrite Jade (Ca2(Mg,Fe)5Si8O22(OH)2) or Chalcedony (SiO2)

Sandstone

Arenite (SiO2 principal)

Sandstone (Ferruginous)

Clastic Sedimentary Rock (SiO2 with Fe2O3/FeOOH cement)

Quartzite

Quartzite (SiO2)

Chert (Jasper/Flint variant)

Microcrystalline Quartz (SiO2)

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Schist

Mica Schist

Quartz-veined Mudstone or Argillite

SiO2 (Quartz) in Siltstone/Mudstone matrix

Fossilized Crinoid Stem Columnal

Phylum Echinodermata; Class Crinoidea (CaCO3)

Basalt

Basalt (comprising plagioclase, pyroxene, and olivine)

Sandstone (Quartz-rich)

Arenite (primarily SiO2)

Leopard Skin Jasper

Chalcedony (cryptocrystalline quartz) with inclusions

Chert (often called Flint when dark)

Sedimentary cryptocrystalline quartz (SiO2)

Granite

Granite (a common term for a felsic intrusive igneous rock)

Sandstone

Arenite (primarily SiO2)

Satin Spar (commercially called Selenite)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Ferruginous Sandstone (Gozzanous)

SiO2 (Quartz) with FeO(OH) (Goethite) or Fe2O3 (Hematite) coating

Schist

N/A (a rock type, not a mineral formula)

Chert Pebble (Jasper variant)

Microcrystalline Quartz (SiO2)

Coquina

Coquina (Bioclastic Limestone)

Chatoyant Quartz (Cat's Eye Quartz)

Silicon Dioxide (SiO2) with fibrous inclusions of Amphibole or Rutile

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Banded Slate or Siltstone with Quartz/Calcite Veins

Protolith-derived Siltstone or Slate (varies based on degree of metamorphism)

Diorite (Dalmatian Stone variant)

Phaneritic Plutonic Igneous Rock (Medium to Fine-grained Diorite)

Anyolite (Ruby in Zoisite)

Zoisite with inclusions of Hornblende and Ruby (Ca2Al3(SiO4)3(OH))

Mica Schist

Mica Schist (primarily Muscovite or Biotite sheet silicates)

Basalt

Mafic Volcanic Rock (composed mainly of Plagioclase, Pyroxene, and Olivine)

Garnet (Almandine variety)

Almandine, Fe3Al2(SiO4)3

Sandstone

Arenite (primarily SiO2)

Green Fluorite

Calcium Fluoride (CaF2)

Labradorite

(Ca, Na)(Al, Si)4O8