Man Made Glass

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Milky Quartz with Inclusions

Silicon Dioxide (SiO2)

Phantom Quartz with Chlorite and Hematite inclusions

Silicon Dioxide (SiO2) with inclusions of Chlorite group minerals and Hematite (Fe2O3)

Red Quartzite (Strawberry Quartz)

Quartzite (SiO2 with iron oxide inclusions)

Chert (Nodule)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Quartz (Raw Chunk)

Silicon Dioxide (SiO2)

Quartz

Quartz (SiO2 - Silicon Dioxide)

Obsidian / Volcanic Glass

Obsidian (principally SiO2, usually 70% or more)

Clear Quartz Crystal (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Red Jasper

Jasper (Silicon Dioxide, SiO2 with Iron oxide inclusions)

Obsidian with Spherulitic Devitrification (Snowflake Obsidian/Mahogany related)

Volcanic Glass (70% or more SiO2)

Quartzite

Quartzite (SiO2 silicon dioxide)

Rose Quartz

Quartz (SiO₂), specifically a variety of Quartz

Nephrite Jade

Nephrite

Quartzite

Quartzite (primarily SiO2)

Slag (Industrial Glass/Byproduct)

Anthropogenic Vitreous Silicate

Quartzite Pebble (with Quartz veins)

Quartzite (SiO2)

Limestone with Calcite Crystals

Calcium Carbonate (CaCO3)

Quartz (likely a form of massive or vein quartz)

Quartz (SiO₂)

Scoria (Red Lava Rock)

Scoria

River Quartzite (Water-worn Quartzite)

Quartzite (primarily SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Obsidian

Obsidian (volcanic glass)

Sandstone

Arenite (composed primarily of SiO2)

Limestone

Calcium Carbonate (CaCO3)

Amber

Succinite (with a generalized formula of C10H16O)

Snowflake Obsidian

Vitreous volcanic silicate (SiO2 with Cristobalite inclusions)

Sandstone

Arenite

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides (Goethite)

Fluorite (likely Green Fluorite variant)

Calcium Fluoride (CaF2)

Sandstone (likely Graywacke or Arkosic varieties)

Arenite (composed primarily of SiO2)

Black Obsidian

Volcanic Glass (predominantly SiO2)

Obsidian

Obsidian (Extrusive Volcanic Glass)

Fluorite

Calcium Fluoride (CaF2)

Quartzite (Sugar Quartz)

Quartzite (primarily SiO2)

Green Chert (Jasper)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Calcite (commonly referred to as Orange Calcite or Honey Calcite given its color)

Calcite

Quartz (likely milky/rose quartz variety)

Quartz (SiO2 - Silicon Dioxide)

Limestone

Calcium Carbonate (CaCO3)

Obsidian

Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)

Clear Quartz

Silicon Dioxide (SiO2)