Sedimentary And Igneous (Mixed)

Apache Tears (Obsidian)

Volcanic Glass (SiO2 - Silicon Dioxide with impurities)

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic volcanic rock with secondary mineral fillings)

Scoria (Lava Rock)

Aphanitic vesicular mafic igneous rock

Chinese Writing Stone

Porphyritic Basalt (or Andesite) with Feldspar inclusions

Porphyritic Basalt (Amygdaloidal)

Porphyritic Mafic Volcanic Rock (Amygdaloidal Basalt)

Obsidian

Obsidian (volcanic glass), amorphous SiO2 + impurities

Mahogany Obsidian

Volcanic glass containing Hematite or Magnetite (SiO2 + Fe2O3)

Granite

Phaneritic Plutonic Igneous Rock (composed of Quartz, Alkali Feldspar, and Plagioclase)

Pegmatite with Smoky Quartz and Feldspar

Pegmatite (Quartz: SiO2, Feldspar: KAlSi3O8)

Granodiorite

Granodiorite (Intermediate intrusive igneous rock)

Porphyritic Basalt

Porphyritic Basalt (containing Plagioclase or Alkali Feldspar phenocrysts)

Obsidian

Volcanic Glass (Silicon Dioxide with impurities)

Mahogany Obsidian

Volcanic Glass with Hematite/Magnetite (SiO2 + Fe2O3)

Diorite (Gneissic)

Diorite

Granite

Granite (Mainly Quartz SiO2, K-Feldspar KAlSi3O8, and Plagioclase)

Pink Granite

Phaneritic Felsic Igneous Rock (Rich in K-Feldspar)

Granite Cobble

Plutonic Granite

Granite (specifically Red Granite)

Phaneritic Plutonic Rock (High in Alkali Feldspar and Quartz)

Orbicular Granite

Orbicular Granidiorite / Plutonic Igneous Rock

Smoky Quartz (Apache Tear Variety)

Silicon dioxide (SiO2) - Volcanic Glass

K2 Jasper (K2 Granite)

Azurite in Granite (Al2Cu3(CO3)2(OH)2 in NaAlSi3O8)

Granitic Pegmatite

Granite Pegmatite (typically containing Quartz SiO2, Feldspar KAlSi3O8, and Muscovite)

Amygdaloidal Basalt

Amygdaloidal Basalt

Granite (Granitic Pegmatite/Porphyry)

Felsic intrusive igneous rock (Quartz, Feldspar, Mica composition)

Granite

Granite (Phaneritic Quartz-Feldspar Igneous Rock)

Granitic Pegmatite with Schorl

Granitic Pegmatite (NaAlSi3O8, KAlSi3O8, SiO2) with Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Basalt with Plagioclase Phenocrysts

Porphyritic Basalt (primarily SiO2, MgO, FeO, and CaO)

Granite

Phaneritic plutonic rock (Quartz, Feldspar, Mica)

Amazonite

Amazonite / Microcline (KAlSi3O8)

Diorite (Salt and Pepper Rock)

Diorite (comprising Plagioclase Feldspar, Hornblende, and Biotite)

Apache Tear

Obsidian (Hydrated Silica Rich Volcanic Glass)

Olivine in Basalt (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4 (Mineral) within Basalt (Rock)

Granite Pebble

Granite (Phaneritic intrusive igneous rock)

Obsidian

Volcanic glass (high silica volcanic rock)

Grey Granite

Phaneritic Felsic Intrusive Igneous Rock

Obsidian (specifically Rainbow or Silver Sheen Obsidian)

Volcanic Glass (predominantly SiO2)

Granite

Granite (Felsic Plutonic Rock)

Granite

Felsic Intrusive Igneous Rock

Granite

Granite (compositional mixture of Quartz, Feldspar, and Mica)

Pink Granite (with Potassic Feldspar and Quartz)

Felsic Intrusive Igneous Rock (Granite)

Obsidian

Volcanic Glass (Amorphous Silicon Dioxide)

Granite

Granite (Felsic Plutonic Rock)