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

Milky Quartz Pebble

Crystalline Silicon Dioxide (SiO2)

Porphyritic Andesite

Porphyritic Andesite (Intermediate Volcanic Rock)

Tree Agate

Dendritic Agate (Silicon Dioxide, SiO2)

Conglomerate

Clastic sedimentary rock (Puddingstone)

Amethyst (Chevron or Banded Amethyst)

Silicon Dioxide (SiO2) with iron impurities

Geode (Chert or Quartz Nodule)

Silicon Dioxide (SiO2)

Dalmatian Jasper (Dalmatian Stone)

Perthitic feldspar with Arfvedsonite inclusions

Red Scoria (Lava Rock)

Vesicular Basalt / Scoria

Arfvedsonite with Garnet

Na3(Fe2+,Mg)4Fe3+Si8O22(OH)2

Clear Quartz

Silicon Dioxide (SiO2)

Mahogany Obsidian

Volcanic Glass (with inclusions of Magnetite or Hematite)

Sandstone (with Limonite staining)

Arenite (primarily SiO2 with FeO(OH)·nH2O)

Black Tourmaline in Quartz

Schorl (NaFe3Al6(BO3)3Si6O18(OH)4) in Silicon Dioxide (SiO2)

Quartz on Greenstone

Silicon Dioxide (SiO2) on Altered Igneous Geologic Unit

Red Sandstone

Arenite (with Iron Oxide)

Greenstone / Serpentinite

Serpentinite (composed primarily of minerals from the serpentine group Mg3Si2O5(OH)4)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Sandstone (Greywacke/Siltstone variant)

Arenite / Wacke (SiO2 with diverse mineral inclusions)

Milky Quartz

Silicon Dioxide (SiO2)

Banded Calcite (Green Onyx)

Calcium Carbonate (CaCO3)

Magnetite (Iron Ore)

Magnetite (Fe3O4)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Larimar

Pectolite [NaCa2Si3O8(OH)] with copper substitution

Red Scoria (Lava Rock)

Scoria (Vesicular Basalt)

Lava Rock (Scoria)

Scoria (Vesicular Basalt)

Granite

Granite (Alkali-feldspar, Quartz, and Plagioclase composition)

Sandstone (likely Quartzose Sandstone)

Arenite (primarily SiO2)

Red Garnet

Almandine Garnet (Fe3Al2(SiO4)3)

Iron-stained Quartz

Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3/FeO(OH))

Granite

Phaneritic Plutonic Felsic Rock

White Chalcedony (Agate)

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Obsidian

Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)

Basalt with Scoria/Vesicular texture

Vesicular Basalt (primarily Plagioclase feldspar, Pyroxene, and Olivine)

Banded Rock (likely Quartz-rich)

Uncertain, likely a Metamorphic Rock (e.g., Gneiss or Schist) with prominent Quartz and other minerals

Diamond

Diamond (C)

Fluorite

Fluorite (Calcium Fluoride, CaF2)

Quartz Geode

Silicon Dioxide (SiO2) within a secondary sedimentary structure

Moss Agate

Silicon Dioxide with inclusions (SiO2 + Mn/Fe oxides)

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone (Glacial Cobble)

Arenite / Sedimentary Rock (primarily SiO2)

Granite (specifically Red Granite)

Phaneritic Plutonic Rock (High in Alkali Feldspar and Quartz)