Igneous

Granite

Phaneritic plutonic igneous rock (Alkali feldspar, Quartz, Plagioclase)

Granite Cobble (River Stone)

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

Basalt

Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)

Basalt

Mafic Igneous Rock (composed primarily of plagioclase feldspar and pyroxene)

Basalt with Caliche Crust

Aphanitic Mafic Igneous Rock with Calcium Carbonate (CaCO3) coating

River Pebble (Gabbro or Basalt)

Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)

Basalt with Scoria/Vesicular Texture

Extrusive Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

Basalt with Sulfide/Pyrite inclusion

Aphanitic Mafic Igneous Rock (likely Basalt) with Pyrite (FeS2)

Pink Granite (Potassium-rich Granite)

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

Granite Cobble

Granite (Phaneritic igneous rock composed of Quartz, Feldspar, and Mica)

Peridotite

Ultramafic intrusive igneous rock (composition: (Mg, Fe)2SiO4)

Basalt with Limonite stains

Extrusive mafic igneous rock; Limonite (FeO(OH)·nH2O)

Granite

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

Pink Granite

Granite (Phaneritic igneous rock rich in Alkali Feldspar and Quartz)

Red Granite

Felsic intrusive igneous rock (K-feldspar rich Granite)

Granite Cobble

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

Pink Granite

Phaneritic Felsic Igneous Rock (Granite, rich in Potassium Feldspar)

Basalt with Plagioclase Feldspar

Basalt (mafic extrusive igneous rock) with plagioclase feldspar phenocrysts

Granite

Felsic Intrusive Igneous Rock (SiO2, Al2O3, K2O, Na2O)

Granite featuring Quartz Vein

Phaneritic Felsic Igneous Rock (Quartz, Orthoclase Feldspar, Mica)

Vesicular Basalt

Extrusive mafic igneous rock (primarily Plagioclase Feldspar and Pyroxene)

Basalt River Stone

Extrusive Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

Granite

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

Granite

Phaneritic plutonic igneous rock (SiO2 range 65-75%)

Granite

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

Granite

Phaneritic Igneous Rock (primarily SiO2, Al2O3, K2O, Na2O)

Basalt

Mafic Igneous Rock (composed primarily of plagioclase feldspar and pyroxene)

Druzy Quartz on Vesicular Basalt

Silicon Dioxide (SiO2) in an extrusive Mafic igneous host rock

Red Granite

Phaneritic Felsic Igneous Rock (Quartz, Alkali Feldspar, Plagioclase)

Basalt with Quartz Vein

Aphanitic Mafic Igneous Rock with Silicon Dioxide (SiO2) intrusion

Granite Pebble

Granite (Phaneritic igneous rock composed of Quartz, Feldspar, and Mica)

Granite

Intrusive Felsic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Granite Pebble

Felsic intrusive igneous rock (consisting primarily of Quartz and Feldspar)

Granite

Phaneritic Igneous Rock (composed of quartz, alkali feldspar, and plagioclase)

Basalt with Quartz/Calcite Inclusion

Aphanitic Mafic Igneous Rock (Basalt) with SiO2 or CaCO3 vein

Granite

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

Basalt with Quartz Veins

Mafic Igneous Rock (primarily Plagioclase and Pyroxene) with SiO2 inclusions

Granite

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

Pink Granite

Phaneritic Felsic Igneous Rock (composed of orthoclase, quartz, and plagioclase)

Granite (Pink/Potassium-rich)

Phaneritic Plutonic Felsic Igneous Rock (primarily SiO2 with KAlSi3O8)

Granite

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

Granite

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