Mineral Like Byproduct (Technogenic)

Granite

Granite (Felsic Plutonic Rock)

Phantom Quartz (Chlorite Inclusion)

Silicon Dioxide (SiO2) with Chlorite (Mg,Fe,Al)6(Si,Al)4O10(OH)8

Quartz (Smoky/Milky variety)

Silicon Dioxide (SiO2)

Chrysocolla

Hydrated copper silicates (Cu, Al)2H2Si2O5(OH)4·nH2O

Schist

Schist (various mineralogical compositions including mica, chlorite, talc, etc.)

Sandstone

Arenite (composed primarily of SiO2)

Tree Agate

Dendritic Agate (Silicon Dioxide, SiO2)

Granite

Phaneritic Plutonic Rock (Granite)

Basalt

Extrusive mafic igneous rock; primarily (Ca,Na)(Mg,Fe,Al,Si)2O6 with (Ca,Na)(Al,Si)4O8

Granite

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

Agate

Silicon Dioxide / Cryptocrystalline Quartz (SiO2)

Jasper

Jasper (Silicon Dioxide, SiO2)

Limonite (Iron Ore)

Limonite (̑FeO(OH)·nH₂O)

Feldspar (Orthoclase)

Orthoclase Feldspar (KAlSi3O8)

Quartz (Smoky/Milky variety)

Silicon Dioxide (SiO2)

Malachite

Copper carbonate hydroxide, Cu2CO3(OH)2

Greenstone

Metamorphosed Mafic Igneous Rock

Milky Quartz with Epidote or Chlorite inclusions

Silicon Dioxide (SiO2) with inclusions of Epidote {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Green Quartz (Prasiolite/Adventurine/Jasper)

Silicon Dioxide (SiO2)

Rutilated Quartz (or Tourmalinated Quartz if inclusions are Tourmaline)

Silicon Dioxide (SiO2) with Rutile (TiO2) or Tourmaline inclusions

Cubic Zirconia (Faceted)

Zirconium dioxide (ZrO2)

Obsidian

Amorphous volcanic glass (SiO2)

Magnetite with Pyrite or Chalcopyrite inclusions

Magnetite (Fe3O4) with Pyrite (FeS2)

Sandstone Concretion

Moqui Marble / Iron-oxide Concretion (SiO2 with Hematite/Goethite)

White Chalcedony (likely Common Opal or Milky Quartz)

Silicon Dioxide (SiO2)

Black Tourmaline

Schorl (Sodium Iron Aluminum Borosilicate Hydroxide)

Garnet (specifically Almandine or Pyrope)

Almandine: Fe3Al2(SiO4)3 or Pyrope: Mg3Al2(SiO4)3

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Granite

Intrusive Felsic Igneous Rock

Limonite (Iron Ore)

Limonite; FeO(OH)·nH2O

Basalt with vesicles/amygdules

Basalt (containing volcanic glass and plagioclase)

Desert Rose

Gypsum (variety Selenite) - CaSO4·2H2O

Smoky Quartz

Smoky Quartz (Silicon Dioxide - SiO2)

Citrine

SiO2 (Silicon Dioxide)

Obsidian

Obsidian (Volcanic Glass, primarily SiO2)

Green Fluorite

Calcium Fluoride (CaF2)

Sandstone (Wonderstone)

Silicified Sandstone / Orthoquartzite with Liesegang rings

Shale

Fissile Mudstone (primarily composed of phyllosilicate minerals like kaolinite, montmorillonite, and illite)

Botryoidal Chalcedony (Druzy Quartz)

Silicon Dioxide (SiO2)

Kyanite in Quartz

Kyanite (Al2SiO5) with Quartz (SiO2)

Limonite / Ironstone Nodule

Limonite (Hydrated iron(III) oxide-hydroxide), FeO(OH)·nH2O