Igneous And Mineral

Greenish Metamorphic Rock (likely containing epidote or chlorite)

Metamorphic rock, possibly epidosite or greenstone

Orbicular Granite

Orbicular Granitoid

Quartz Cobble (River Stone)

Crystalline Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Granite

Granite

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Granite

Phaneritic Felsic Igneous Rock

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Fluorite

Calcium Fluoride (CaF2)

Honey Calcite

Calcium Carbonate (CaCO3)

Milky Quartz

Silicon Dioxide (SiO2)

Gneiss

Metamorphic Gneiss (High-grade regional metamorphism)

Pyrite (Fool's Gold) in Matrix

Iron Disulfide (FeS2)

Quartz Pebble

Silicon Dioxide (SiO2)

Yellow Quartz (Citrine or Yellow Jasper)

Silicon Dioxide (SiO2) with iron impurities

Pyrite

Iron Sulfide (FeS2)

Rose Quartz

Silicon dioxide (SiO2)

Pyrite in Matrix

Iron Sulfide (FeS2)

Rose Quartz

Rose Quartz (SiO2 with traces of Ti, Fe, or Mn)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Citrine or Iron-Stained variety)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Banded Agate (specifically Carnelian Agate)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Hematite (Tumbled)

Iron(III) oxide (Fe2O3)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Milky Quartz

Silicon Dioxide (SiO2)

Pyrite

Iron Disulfide (FeS2)

Gold in Quartz Matrix

Native Gold (Au) with Quartz (SiO2) and Slate/Shale

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Pyrite

Iron Pyrite (FeS2)

Pyrite (on host rock/ore)

Iron Sulfide (FeS2)

Hematite

Iron(III) oxide (Fe2O3)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Green Calcite

Calcium Carbonate (CaCO3)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)