Igneous, Metamorphic, Sedimentary

Quartz

Silicon dioxide (SiO2)

Educational Geologic Collection

Mixed Mineral and Rock Collection (Various compositions)

Calcite

Calcium Carbonate (CaCO3)

Gneiss and Igneous Rock Collection

Foliated Metamorphic Rock (Gneiss) / Igneous Rocks

Calcite

Calcium Carbonate (CaCO3)

Pyrite

Iron Pyrite (FeS2)

Honey-colored quartz cluster

Quartz, silicon dioxide (SiO₂), likely iron-stained or included quartz

Gneiss

Metamorphic Gneiss

Quartz (likely a form of massive or vein quartz)

Quartz (SiO₂)

Gneiss

Gneiss (High-grade metamorphic rock)

Small pale mineral/rock fragment

Indeterminate; possibly weathered quartz, calcite, or light-colored limestone

Quartz (Milky or Cloudy Quartz)

Silicon Dioxide (SiO2)

Quartz Pebble

Crystalline Silicon Dioxide (SiO2)

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Quartz (Smoky/Rock Crystal)

Silicon Dioxide (SiO2)

Hematite

Iron (III) Oxide (Fe2O3)

Quartz (Clear/Crystalline)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz (Milky or Yellow/Citrine Quartz)

Silicon Dioxide (SiO2)

Gravel (Crushed Stone Aggregates)

Mixed Siliciclastic / Carbonate Aggregate

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (Milky Quartz / Clear Quartz)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Yellow Calcite

Calcium Carbonate (CaCO3)

Pyrite

Iron Disulfide (FeS2)

White Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz Crystal

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)