Man Made Object (Metalwork)

Clear Quartz

Silicon Dioxide (SiO2)

Chert (variations include Flint or Jasper)

Chert (SiO2)

Clear Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (SiO2 prominent)

Sandstone

Arenite (Sedimentary Rock)

Quartzite Pebble

Quartzite (primarily SiO2)

Kimberlite

Kimberlite (Group I or II)

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone Beach Pebble

Clastic sedimentary rock (SiO2 with iron oxide cement)

Milky Quartz

Silicon Dioxide (SiO2)

Orthoclase Feldspar (Twinning Specimen)

Orthoclase (KAlSi3O8)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (Smoky/Milky variant)

Silicon Dioxide (SiO2)

Milky Quartz (with Chlorite/Mineral Inclusions)

Silicon Dioxide (SiO2)

Hematite (Iron Ore)

Hematite (Fe2O3)

Shale

Fissile Mudrock (Clay-rich Sedimentary Rock)

Quartz Druzy on Matrix (with Copper Mineralization)

Silicon Dioxide (SiO2) with Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·n H2O)

Clear Quartz

Silicon Dioxide (SiO2)

Sandstone

Arenite (Siliclastic sedimentary rock)

Amber

Succinite (fossilized resin); C10H16O

Yellow Calcite

Calcite (Calcium Carbonate, CaCO3)

Quartzite

Quartzite (primarily SiO2)

Sandstone (Red)

Arenite (SiO2 with Fe2O3)

Chalk (Sedimentary Limestone)

Calcium Carbonate (CaCO3) - Bioclastic Limestone

Shale

Mudstone/Shale

Sandstone

Arenite/Quartz Arenite

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Feldspar (Orthoclase/Potassium Feldspar)

KAlSi3O8 (Potassium Aluminum Silicate)

Hematite

Iron(III) oxide (Fe2O3)

Rhodonite

Rhodonite (Manganese Iron Magnesium Calcium Silicate) - (Mn,Fe,Mg,Ca)SiO3

Sandstone

Arenite (composed primarily of SiO2)

Quartzite with Quartz Vein

Quartzite (primarily SiO2)

Rhodonite

Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3

Satin Spar (Selenite)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Sand (Construction Grade)

Unconsolidated siliciclastic sediment (primarily SiO2)

Amethyst and Peridot

Amethyst (SiO2 with iron impurities) and Peridot ((Mg, Fe)2SiO4)

Raw Diamond (Rough Uncut)

Diamond (C - pure carbon)

Ferrous Slag

Fused calcium-iron silicates (Industrial Slag)

Rose Quartz

SiO2 (Silicon Dioxide)

Apricot Agate

Silicon Dioxide (SiO2) - Chalcedony variety

Rose Quartz

Silicon Dioxide (SiO2)