Mineral Like (Anthropogenic)

Obsidian

Volcanic Glass (Silicon Dioxide with impurities)

Schist (Micaceous Schist)

Micaceous schist (Mainly Muscovite/Biotite mixed with Quartz)

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic Volcanic Rock)

Diorite (Salt and Pepper Rock)

Diorite

Fluorite

Fluorite (Calcium Fluoride - CaF2)

Chrysocolla

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

Agate (specifically, a slice of a Blue Lace or Chalcedony Agate nodule)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic volcanic rock)

Quartz (Microcrystalline Fragment)

Silicon Dioxide (SiO2)

Vesicular Basalt

Basalt with vesicular texture

Chert (specifically Flint or Common Chert)

Chert (Cryptocrystalline Silica, SiO2)

Schist

Mica Schist

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Mica Schist

Muscovite/Biotite Schist

Chert (Cherty Limestone / Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Vesicular Basalt with Secondary Mineral Inclusions

Aphanitic Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

Botryoidal Hematite (Iron Ore)

Iron(III) oxide (Fe2O3)

Sandstone

Arenite (SiO2 based)

Amethyst (Rose de France)

Silicon Dioxide (SiO2) with iron impurities

Composite Turquoise or Reconstituted Turquoise with Copper inclusions

CuAl6(PO4)4(OH)8·4H2O (Turquoise) mixed with matrix and copper/bronze flakes

Watermelon Tourmaline in Quartz Matrix

Elbaite (complex Borosilicate) - Na(Li,Al)3Al6(BO3)3Si6O18(OH)4

Turquoise

Turquoise - CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)

Peacock Ore (Bornite or Chalcopyrite)

Bornite (Cu₅FeS₄) or iridescent Chalcopyrite (CuFeS₂)

Ferruginous Quartz

Iron-stained Quartz (Silicon Dioxide + Fe2O3 / FeO(OH))

Fluorite (Rainbow Fluorite Point)

Calcium Fluoride (CaF2)

Petrified Wood

Silicified Wood (SiO2)

Sunstone

Plagioclase Feldspar (Na, Ca)(Al, Si)4O8 with Hematite or Copper inclusions

Granitic Pegmatite

Coarse-grained Granite (KAlSi3O8 + SiO2)

Sandstone

Arenite (SiO2 based with mineral cement)

Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (Milky/Crystalline variety)

Silicon Dioxide (SiO2)

Quartzite

Silica (SiO2)

Granite

Granite (composed primarily of Quartz SiO2, Alkali Feldspar KAlSi3O8, and Plagioclase)

Vesicular Basalt with Oxidation

Scoriaceous Olivine Basalt (Mafic volcanic rock)

Serpentine

Serpentine group minerals (e.g., Antigorite, Chrysotile, Lizardite). Chemical formula: (Mg, Fe)₃Si₂O₅(OH)₄

Porphyry (Flower Stone)

Porphyry (Andesite or Basalt matrix)

Granite with Mafic Inclusions

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

Sandstone (likely Quartzose Sandstone pebble)

Arenite (primarily SiO2)

Phantom Quartz (Chlorite Inclusion)

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

Conglomerate

Clastic sedimentary rock (Puddingstone)

Quartz (Milky/Rose variety)

Silicon Dioxide (SiO2)

Obsidian

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