Igneous, Metamorphic, Sedimentary

Red Garnet (likely Almandine or Pyrope)

Garnet group: X3Y2(SiO4)3 (e.g., Almandine: Fe3Al2Si3O12)

Magnetite

Magnetite (Iron(II,III) oxide, Fe3O4)

Green Gneiss

Metamorphic Gneiss

Faceted Gemstones (Mixed)

Various (e.g., Corundum, Beryl, Quartz, or synthetic equivalents)

Quartz pebble

Silicon dioxide (SiO2)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Pyrite

Iron Disulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Clear Quartz / Rock Crystal

Silicon Dioxide (SiO2)

Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Crystalline Silicon Dioxide (SiO2)

Yellow Calcite

Calcium Carbonate (CaCO3)

Blue Apatite

Apatite group (Ca5(PO4)3(F,Cl,OH))

Blue Calcite

Calcite (Calcium Carbonate, CaCO3)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz (Milky/Crystalline variety)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

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)

Gravel / Crushed Stone

Aggregate (mixed mineral rock fragments)

Pyrite

Iron Sulfide (FeS2)

Quartz fragment (Pebble)

Silicon Dioxide (SiO2)

Pyrite

Iron Pyrite (FeS2)

Common Opal

SiO2·nH2O (Hydrated Silicon Dioxide)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Mossy Rock

Mixed lithology rock with Bryophyta (moss)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Pink Feldspar

Potassium Feldspar (Microcline or Orthoclase), KAlSi3O8

Quartz Pebble

Silicon Dioxide (SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Quartz Mineral

Silicon Dioxide (SiO2)

Hematite

Hematite (Α-Fe2O3)

Blue Calcite

Calcium Carbonate (CaCO3)

Quartz

Silicon Dioxide (SiO2)

Quartz Fragment

Silicon Dioxide (SiO2)