Igneous Or Sedimentary

Basalt with Plagioclase Feldspar

Basalt (mafic extrusive igneous rock) with plagioclase feldspar phenocrysts

Granite

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

Basalt with Limonite stains

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

Pink Granite

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

Basalt River Stone

Extrusive Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

Druzy Quartz on Vesicular Basalt

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

Granite

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

Vesicular Basalt

Extrusive mafic igneous rock (primarily Plagioclase Feldspar and Pyroxene)

Granite

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

Granite

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

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 (primarily Quartz, Feldspar, and Mica)

Aquamarine

Beryl (Be3Al2Si6O18)

Topaz

Topaz (Al2SiO4(F,OH)2)

Peridot (likely, based on color and appearance)

Olivine group mineral, specifically (Mg,Fe)2SiO4 (Forsterite-Fayalite solid solution series)

Granite

Granite (a felsic intrusive igneous rock)

Milky Quartz

Quartz / Silicon Dioxide (SiO2)

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Porphyritic Basalt or Diabase with Plagioclase Phenocrysts

Porphyritic Basalt or Diabase; Mineral: Plagioclase Feldspar

Obsidian

Amorphous volcanic glass (primarily SiO2)

Granite

Granite (composed mainly of Quartz, Feldspar, and Mica)

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Sunstone

Oligoclase (Plagioclase Feldspar subclass), (Ca,Na)(Al,Si)4O8

Red Garnet (Pyrope or Almandine)

Garnet Group (A3B2(SiO4)3)

Strawberry Quartz

Silicon Dioxide (SiO2) with Hematite or Goethite inclusions

Quartz (Milky/Smoky variety)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Citrine

Silicon Dioxide (SiO2)

Labradorite

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

Milky Quartz

Silicon Dioxide (SiO2)

Garnet (Pyrope-Almandine series)

Garnet Group, (Mg,Fe)3Al2Si3O12

Amethyst

Silicon Dioxide (SiO2) with trace Iron (Fe3+)

Smoky Quartz

Silicon Dioxide (SiO2)

Amethyst

Silicon Dioxide (SiO2) with trivalent iron (Fe3+) impurities

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Moonstone

Orthoclase feldspar (KAlSi3O8)

Citrine

Citrine (Silicon Dioxide, SiO2)

Moonstone

Orthoclase Feldspar ((K,Na)AlSi3O8)

Labradorite

Labradorite (Plagioclase Feldspar series; (Ca,Na)(Al,Si)4O8)

Citrine

Silicon Dioxide (SiO2) with iron impurities