Industrial By Product

Anthracite Coal

Anthracite (Carbon)

Mica Schist

Mica Schist (primarily Muscovite or Biotite sheet silicates)

Schist

Mica Schist

Rose Quartz and Milky Quartz

Silicon Dioxide (SiO2)

Chert (specifically Flint or Dark Chert)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Quartzite

Quartzite (mostly SiO2)

Agate

Silicon Dioxide (SiO2)

Yellow Sapphire

Corundum (Al2O3)

Diamond

Carbon (C)

Bismuth Crystal

Bismuth (element symbol Bi, atomic number 83)

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide impurities), SiO2

Blue Calcite

Calcium Carbonate (CaCO3)

Orange Calcite

Calcium Carbonate (CaCO3)

Almandine Garnet

Fe3Al2(SiO4)3

River Quartz Pitting/Cobble

Silicon Dioxide (SiO2)

Milky Quartz Cobble

Silicon Dioxide (SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Kyanite (Blue and Green varieties)

Kyanite (Al₂SiO₅)

Chert (Arrowhead Preform)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Banded Agate (Tumbled)

Agate (Silicon Dioxide, SiO2 - Cryptocrystalline Quartz)

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Aragonite Star Cluster

Aragonite (Calcium Carbonate - CaCO3)

Diamond (Set in jewelry)

Cubic Carbon (C)

Quartzite

Quartzite (primarily SiO2)

Diamond

Diamond (C)

Chert (specifically Blue Chert/Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Agate Slices and Clear Quartz Points

Agate (SiO2 Chalcedony) and Clear Quartz (SiO2 Crystalline)

Diamond

Carbon (C)

Glauconitic Sandstone (Greensand)

Glauconitic Sandstone (Iron-potassium phyllosilicate mineral: (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2)

Bauxite

Bauxite (principal ore of aluminum, primarily Al(OH)3)

Pink Granite

Phaneritic intrusive felsic igneous rock

Granite

Phaneritic Plutonic Felsic Rock

Scoria (Red Lava Rock)

Scoria (Vesicular Basalt/Andesite)

Granite Pebble

Felsic Plutonic Rock (primarily Quartz, Feldspar, and Mica)

Garnet

Garnet group [X3Y2(SiO4)3]

Chalcedony

Chalcedony (SiO2)

Blue Kyanite

Kyanite (Al2SiO5)

Chalcedony (Agate/Carnelian variety)

Cryptocrystalline Quartz (SiO2)

Black Tourmaline

Schorl (Sodium iron aluminum borosilicate), NaFe3Al6(BO3)3Si6O18(OH)4

Quartz Pebble

Silicon Dioxide (SiO2)

Satin Spar (Selenite Gypsum Sphere)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O