Mineral Like Byproduct (Often Mistaken For Igneous Rock Or Meteorite)

Basalt (with possible Olivine inclusions)

Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

Quartz Geode

Silicon Dioxide (SiO2)

Turquoise

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

Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

White Zircon

Zircon (Zirconium silicate, ZrSiO4)

Vesicular Basalt (or Scoria)

Vesicular Basalt (Aphanitic-vesicular volcanic rock)

Labradorite (a variety of Feldspar)

Labradorite; (Na,Ca)(Al,Si)4O8 (a plagioclase feldspar)

Granite (likely a river or beach pebble)

Granite (a felsic intrusive igneous rock primarily composed of quartz, feldspar, and mica)

Diorite (Salt and Pepper Rock)

Diorite

Granite

Phaneritic Felsic Igneous Rock

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Biotite (Black Mica)

Biotite (K(Mg,Fe)3AlSi3O10(OH)2)

Granite

Phaneritic Felsic Igneous Rock (Granite)

Sandstone (Quartzose)

Arenite (composed primarily of SiO2)

Chalcedony (Agate/Jasper mix in host rock)

Chalcedony (cryptocrystalline Silicon Dioxide, SiO2)

Sandstone (River Rock)

Arenite (composed primarily of SiO2)

Brown Sandstone

Arenite (primarily Quartz and Feldspar, with Iron Oxide cement)

Granite

Granite (a felsic intrusive igneous rock)

Sunstone

Aventurine Feldspar (Plagioclase Feldspar with inclusions)

Pyrite

Pyrite (FeS2)

Quartz Druzy Geode

Silicon Dioxide (SiO2)

Rose Quartz

Silicon dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Red Scoria (Lava Rock)

Scoria (Vesicular Basalt)

Ferruginous Sandstone

Sandstone (arenite) with Limonite/Goethite cement

Schist

Mica Schist

Obsidian

Obsidian (Volcanic Glass)

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Dalmatian Stone (often called Dalmatian Jasper)

Peralkaline Quartz-Feldspar Rock with Arfvedsonite (formerly believed to be Jasper)

Sandstone

Arenite (Siliclastic Sedimentary Rock)

Yellow Calcite

Calcium Carbonate (CaCO3)

Sandstone

Sandstone (various mineral compositions)

River Stone (likely Mudstone or Siltstone)

Lutite (Clastic sedimentary rock composed of clay and silt-sized particles)

Sandstone (lithic/greywacke variety)

Arenite (composed primarily of SiO2 with various lithic fragments)

Quartz Vein (Iron-stained)

Silicon Dioxide (SiO2) with limonite/hematite staining

Sandstone

Arenite (composed primarily of SiO2)

Basalt

Basalt (Mafic volcanic rock, primarily Plagioclase and Pyroxene)

Quartz / Milky Quartz

Silicon Dioxide (SiO2)

Greenstone

Greenschist / Greenstone (Chlorite-Epidote facies)

Druzy Quartz on Vesicular Basalt

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

Quartz

Quartz (SiO2 - Silicon Dioxide)

Greasy Quartz (likely carved Milky Quartz or Aventurine)

Silicon Dioxide (SiO2)