Antropogenic (Man Made Glass Byproduct)

Jasper

Jasper (Silicon Dioxide, SiO2)

Chalcopyrite in Quartz (Gold-bearing Ore)

CuFeS2 (Chalcopyrite)

Milky Quartz

Crystalline Quartz (SiO2)

Quartz Druzy

Silicon Dioxide (SiO2)

Chalcedony (specifically Agate or Moonstone-like Quartz)

Silicon Dioxide (SiO2)

Quartzite

Metamorphic Quartzite (SiO2)

Quartzite

Metamorphic Quartzite (SiO2)

Quartzite

Quartzite (Metamorphic Rock)

Quartzite

Metamorphic Quartzite (SiO2)

Quartzite

Metamorphic Quartzite

Quartzite Pebble (River Rock)

Quartzite (primarily SiO2)

Fluorite

Calcium Fluoride (CaF2)

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Rose Quartz

Silicon Dioxide (SiO2)

Chert / Flint

Microcrystalline Quartz (SiO2)

Quartz Cluster

Silicon Dioxide (SiO2)

Fluorite

Calcium Fluoride (CaF2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Jasper

Silicon dioxide (SiO2)

Quartz Sand and Gravel

Silicon dioxide (SiO2)

Clear Quartz

Silicon dioxide (SiO2)

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2) with Hematite/Limonite

White Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartzite

Metamorphic Quartz Arenite (SiO2)

Quartzite

Metamorphic Quartzite

Blue Apatite

Fluorapatite / Apatite (Ca5(PO4)3(F,Cl,OH))

Blue Apatite

Chlorapatite / Fluorapatite (Ca5(PO4)3(F,Cl,OH))

Limestone

Calcium Carbonate (CaCO3)

Milky Quartz (Carved Star Beads)

Silicon Dioxide (SiO2)

Sapphire (Raw/Rough)

Corundum (Al2O3)

Milky Quartz

Silicon Dioxide (SiO2)

Rose Quartz

Quartz (Silicon Dioxide, SiO2)

Rough Diamond / Clear Quartz

C (Carbon) or SiO2 (Silicon Dioxide)

Rose Quartz

Silicon Dioxide (SiO2)

Citrine

Silicon Dioxide (SiO2) with iron impurities

Jasper with Dendritic Inclusions

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Citrine

Silicon Dioxide (SiO2)