Igneous Rock

Basalt (Crushed Roadstone)

Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

Unakite

Epidotized Granite

Granite

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

Basalt (Water-worn pebble)

Mafic Igneous Rock (primarily Plagioclase feldspar and Pyroxene)

Garnet

Garnet Group (complex nesosilicates with general formula X3Y2(SiO4)3, where X can be Ca, Mg, Fe2+, Mn2+ and Y can be Al, Fe3+, Cr3+, V3+)

Basalt with Iron Oxidation

Extrusive Mafic Igneous Rock (composed of Plagioclase and Pyroxene)

Basalt

Basalt (Aphanitic-fine grained mafic igneous rock)

Basalt

Mafic igneous rock (primarily Plagioclase feldspar and Pyroxene)

Pink Granite

Phaneritic intrusive igneous rock (K-feldspar rich)

Granite with Orthoclase and Hematite Staining

Phaneritic Felsic Igneous Rock (primarily SiO2 with KAlSi3O8)

Basalt

Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

Granite

Granite (a plutonic igneous rock composed primarily of quartz and feldspar)

Basalt

Mafic Igneous Rock (composed primarily of Plagioclase and Pyroxene)

Basalt with Caliche

Extrusive Mafic Igneous Rock with Secondary Carbonate Crust

Black Obsidian

Obsidian, volcanic glass (Amorphous SiO₂)

Feldspathic Granite (likely Syenite or Granite Pegmatite)

Phaneritic Acidic Igneous Rock (KAlSi3O8 dominant with SiO2)

Porphyry

Porphyritic Igneous Rock (likely Porphyritic Andesite or Basalt)

River Rocks (Basalt and Sedimentary Stones)

Mafic Igneous Rock (Basalt) and Clastic Sedimentary Rock

Granite

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

Pink Granite

Phaneritic plutonic igneous rock (Alkali-feldspar granite)

Porphyry (specifically Porphyritic Rhyolite or Andesite)

Porphyritic Igneous Rock (composed of Phenocrysts in an Aphanitic groundmass)

Granite

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

Granite

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

Granite

Granite (Phaneritic Igneous Rock / Quartz, Feldspar, Mica)

Granite (Weathered River Rock)

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

Granite (Pink/Red Granite)

Phaneritic Igneous Rock (primarily SiO2, KAlSi3O8, NaAlSi3O8)

Pink Granite

Phaneritic Igneous Rock (high K-feldspar content)

Granite

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

Obsidian

Volcanic glass (SiO2-rich extrusive igneous rock)

Granite (specifically Brown Granite Countertop)

Phaneritic Felsic Igneous Rock (Granite-Gabbro series)

Basalt (River Pebble)

Extrusive Magic Igneous Rock (Mainly Plagioclase and Pyroxene)

Granite Pebble

Granite (a plutonic igneous rock composed primarily of quartz, feldspar, and mica/amphibole)

Basalt

Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

Basalt

Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

Basalt

Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

Granite

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

Granite

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

Pink Granite

Phaneritic Felsic Igneous Rock (Rich in K-Feldspar)

Granitic Pegmatite

Granite Pegmatite (coarse-grained intrusive igneous rock)

Basalt

Mafic Igneous Rock (composed of plagioclase feldspar and pyroxene)

Basalt

Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

Pink Granite

Felsic intrusive igneous rock (composition: SiO2 and Al2O3)