Mineral And Glass

Milky Quartz Pebble (Tumbled Quartzite)

Silicon Dioxide (SiO2)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Limonite/Hematite inclusions

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Yellow Aventurine (or Citrine-colored Quartz)

Silicon Dioxide (SiO2) with inclusions

Obsidian

Obsidian (Amorphous volcanic glass, predominantly SiO2)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Clear Quartz Fragment

Quartz (Silicon Dioxide, SiO2)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Smoky Quartz (Tumbled)

Smoky Quartz (Silicon Dioxide - SiO2)

Smoky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Milky Quartz (with Iron Oxide staining)

Quartz (Silicon Dioxide - SiO2)

Rose Quartz

Silicon Dioxide (SiO2) with trace elements of titanium, iron, or manganese

Milky and Ferruginous Quartz

Silicon Dioxide (SiO2)

Smoky Quartz

Smoky Quartz (Silicon Dioxide - SiO2)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Massive Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Milky and Bull Quartz)

Silicon Dioxide (SiO2)

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

White Quartz (Milky Quartz)

Quartz (Silicon Dioxide - SiO2)

Sandstone

Arenite (composed primarily of SiO2)

Sandstone (Ferruginous)

Arenite (with iron oxide cement, Fe2O3)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Black Sapphire

Corundum (Al2O3 with inclusions of hematite or ilmenite)

Libyan Desert Glass

Tektite (high-silica impact glass), SiO2 + tracing minerals

Sandstone (Quartzose Sandstone)

Arenite (SiO2 primarily)

Sandstone (with Lichen)

Arenite (primarily SiO2)

Sandstone

Arenite (composed primarily of SiO2)

Sandstone (likely Quartzose Sandstone)

Arenite (composed primarily of SiO2)

Sandstone

Arenite (primarily SiO2)

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Quartz (Milky or Iron-stained)

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Microcrystalline/Chert)

Silicon Dioxide (SiO2)

Clear Quartz Cluster

Silicon Dioxide (SiO2)

Obsidian

Volcanic glass (SiO2 - Silicon Dioxide with impurities)

Milky Quartz Pebble

Crystalline Silicon Dioxide (SiO2)