Industrial Byproduct (Often Confused With Igneous Rocks Or Meteorites)

Quartzite

Quartzite (SiO2)

Tree Agate

SiO2

Ferruginous Sandstone (Ironstone Nodules)

Ferruginous Sandstone with Limonite/Goethite coating (Fe2O3·H2O)

Basalt Scoria

Vesicular Basalt

Garnet

Garnet Group (Silicate Minerals), formula varies e.g., Almandine Fe3Al2(SiO4)3

Rough Star Sapphire (Corundum)

Al2O3 (Aluminum Oxide)

Blue Apatite

Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)

Sodalite

Sodalite (Na8Al6Si6O24Cl2)

Tektite (Indochinite)

Tektite (Silica-rich natural glass)

Carborundum (Silicon Carbide)

Silicon Carbide (SiC) / Moissanite (natural form)

Garnet (likely Almandine or Pyrope)

Garnet Group (Fe3Al2Si3O12 or Mg3Al2Si3O12)

Ruby

Corundum (Al2O3 with Chromium traces)

Sodalite

Sodalite, Na8(Al6Si6O24)Cl2

Chalcopyrite (Peacock Ore)

Chalcopyrite (CuFeS2)

Chinese Writing Stone

Porphyritic Basalt or Porphyritic Andesite with Feldspar phenocrysts (SiO2-rich Silicates)

Quartzite

Quartzite (primarily SiO2)

Quartz with Muscovite Mica

SiO2 with KAl2(AlSi3O10)(OH)2

Chondrite Meteorite

L or H type Ordinary Chondrite

Pink Quartzite

Quartzite (primarily SiO2)

Pink Quartzite

Quartzite (primarily SiO2)

Schist

Chlorite/Mica Schist

Magnetite Sand (Black Sand)

Magnetite (Fe3O4)

Peridot (likely, based on color and appearance)

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

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Yellow Quartzite

Quartzite (SiO2 with iron oxide inclusions)

Peridot (Olivine)

Olivine, (Mg,Fe)2SiO4

Blue Sapphire (Tumbled/Polished)

Corundum (Al2O3)

Quartz Geode (with possible Manganese or Goethite coating)

Silicon Dioxide (SiO2)

Garnet (Pyrope-Almandine series)

Garnet Group, (Mg,Fe)3Al2Si3O12

Tektite (Indochinite)

Tektite (Amorphous Silica Glass), SiO2(Al2O3)

Cat's Eye Moonstone (Simulated/Synthetic or natural Cat's Eye Quartz/Glass)

There is no single scientific name. The appearance suggests either: Moonstone (feldspar group), Cat's Eye Quartz (SiO2), Apatite (Ca5(PO4)3(F,Cl,OH)), or most likely a synthetic material such as Fiber Optic Glass or 'Opalite' (a type of glass).

Iron Meteorite (likely Chondrite or weathered Iron-Nickel)

Meteorite (Fe-Ni alloy & silicates)

Sodalite

Sodalite, Na8(Al6Si6O24)Cl2

Ferruginous Sandstone (Ironstone)

Sedimentary rock with high iron oxide content (Fe2O3 / FeO(OH))

Blue Sapphire

Corundum (Al2O3)

Black Sapphire

Corundum (Al2O3 with iron and titanium impurities)

Yellow Quartzite

Quartzite (primarily SiO2)

Blue Sapphire

Corundum (Al2O3 - Aluminum Oxide)

Quartzite

Quartzite (Mainly SiO2)

Quartzite

Quartzite (primarily SiO2)

Peridot (Olivine)

Magnesium Iron Silicate (Mg, Fe)2SiO4

Ruby

Corundum (Al2O3 with Chromium traces)