Igneous (Anthropogenic)

Granite (Pink/Red Granite)

Phaneritic Igneous Rock (primarily SiO2, KAlSi3O8, NaAlSi3O8)

Pink Granite

Phaneritic Igneous Rock (high K-feldspar content)

Pumice

Vesicular Rhyolite (highly vesicular igneous volcanic rock)

Granite

Plutonic Igneous Rock (composed of Quartz, Feldspar, and Mica)

Obsidian

Volcanic glass (SiO2-rich extrusive igneous rock)

Basalt

Extrusive Igneous Basalt (contains Plagioclase Feldspar and Pyroxene)

Granite

Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Granite (specifically Brown Granite Countertop)

Phaneritic Felsic Igneous Rock (Granite-Gabbro series)

Porphyry

Porphyritic Igneous Rock (likely Porphyritic Andesite or Basalt)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within Sedimentary or Igneous Matrix

Basalt

Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

Basalt with Pahoehoe flow texture

Vesicular Basalt (Aphanitic Mafic Igneous Rock)

Basalt (with possible iron oxide staining)

Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

Granite

Granite (silica-rich intrusive igneous rock)

Pink Granite

Granite (Phaneritic igneous rock rich in Orthoclase)

Granite

Granite (Phaneritic Quartz-Feldspar Igneous Rock)

Granite (Pink/Red)

Phaneritic Igneous Rock (Rich in K-Feldspar)

Basalt

Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

Basalt with Granite Inclusions (Xenoliths)

Mafic igneous rock (Basalt) with Sialic minerals

Granite (Dioritic or Hornblende-rich)

Phaneritic Plutonic Felsic to Intermediate Igneous Rock

Basalt Column Section

Columnar Basalt (Mafic Extrusive Igneous Rock)

Crushed Stone (Basalt/Gabbro)

Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

Basalt

Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

Pumice

Pumice (a highly vesicular extrusive igneous rock)

Vesicular Basalt (Scoria)

Aphanitic Mafic Igneous Rock (Vesicular Basalt)

Diorite

Phaneritic Intrusive Igneous Rock (Intermediate Composition)

Scoria

Extrusive Igneous Rock (Basaltic/Andesitic Composition)

Pumice

Pumice (Vesicular felsic extrusive igneous rock)

Granite (with Orthoclase and Quartz)

Phaneritic Felsic Igneous Rock (KAlSi3O8 + SiO2)

Vesicular Rhyolite

Extrusive igneous rock (high-silica rhyolite)

Basalt (with possible Olivine inclusions)

Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

Pumice

Pumice (a highly vesicular extrusive igneous rock)

River Basalt (Cobble)

Mafic Igneous Rock (Fine-grained Basalt)

Vesicular Basalt

Aphanitic Mafic Igneous Rock (with Vesicular Texture)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Turquoise

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

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Veined Quartz

SiO2 (Silicon Dioxide)

Granite

Granite (a felsic intrusive igneous rock)

Basalt with Scoria/Vesicular Texture

Extrusive Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

Granite Cobble (River Stone)

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

Pink Granite (Potassium-rich Granite)

Phaneritic Felsic Igneous Rock (primarily SiO2, Al2O3, K2O)