Mineral Like Byproduct (Technogenic)

Rose Quartz Druzy

Silicon Dioxide (SiO2)

Feldspar-rich Pegmatite

Granitic Pegmatite (principally KAlSi3O8)

Raw Diamond (Rough Uncut)

Diamond (C - pure carbon)

Dendritic Quartz

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

Banded Calcite (often sold as 'Mexican Onyx' or 'Calcite Onyx')

Calcite (Calcium Carbonate, CaCO3)

Sandstone

Arenite

Chalcedony

Silicon dioxide (SiO2) - Cryptocrystalline Quartz

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Arsenopyrite

Arsenopyrite (FeAsS)

Quartz Geode

Clear Quartz (Silicon Dioxide, SiO2)

River Rock (Greywacke/Sandstone)

Lithic Wacke

Turquoise

Turquoise (CuAl6(PO4)4(OH)8·4H2O)

Sandstone with Algae Growth

Arenite with Chlorophyta/Lichen

Specular Hematite with Quartz

Ferric oxide (Fe2O3) and Silicon dioxide (SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Bauxite

Alumina-rich rock (consisting of Gibbsite, Boehmite, and Diaspore)

Granite

Granite (Felsic Plutonic Rock)

Schist/Phyllite

Metamorphic Schist (Chlorite Schist variety)

Granodiorite

Granodiorite (Intermediate intrusive igneous rock)

Arsenopyrite

Arsenopyrite (FeAsS)

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Orthoclase (Potassium Feldspar)

KAlSi3O8 (Potassium Aluminum Silicate)

Satin Spar (Selenite)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Green Quartz (Prasiolite/Adventurine)

Silicon Dioxide (SiO2) with inclusions

Blue Lace Agate

Silicon Dioxide (SiO2) - Variety of Chalcedony

Druzy Quartz

Silicon Dioxide (SiO2)

Bronzite

MgSiO3 (Enstatite with 10-30% FeSiO3 in solid solution)

Amazonite

K(AlSi3O8) - Microcline variant

Peridot

Olivine ((Mg, Fe)2SiO4)

Sandstone Concretion

Sandstone (Sedimentary Rock) with silica or calcite cement

Quartz Geode (Druzy)

Crystalline Silicon Dioxide (SiO2)

Red Sandstone

Arenite (with Iron Oxide)

Mica Schist

Foliated Metamorphic Rock (rich in Muscovite or Biotite)

Quartzite

Quartzite (primarily SiO2)

Black Obsidian

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

Cloudy Quartz

Silicon Dioxide (SiO2)

Shale

Argillaceous Rock

Aventurine Quartz

Silicon Dioxide (SiO2) with Fuchsite inclusions

Sandstone

Arenite (composed primarily of SiO2)

Shale

Shale (Lutite)

Red Sandstone

Arenite (Ferruginous Sandstone)

Sandstone

Arenite