Mineral On Sedimentary

Chert (Flint/Chalcedony)

Microcrystalline Quartz (SiO2)

Chert (often called Jasper in this color variety)

Microcrystalline Quartz (SiO2)

Picture Jasper

Silicon dioxide (SiO2)

Kambaba Jasper (Crocodile Jasper)

Stromatolitic Rhyolite/Jasper (SiO2)

Staurolite (Fairy Cross)

Staurolite (Fe2+2Al9Si4O23(OH))

Jasper with Quartz Veining

Silicon Dioxide (SiO2) - Opaque cryptocrystalline variety of Quartz

Orange Calcite

Calcite (CaCO3)

Aragonite Star Cluster

Aragonite (Calcium Carbonate, CaCO3)

Common Opal with Host Rock

Opal (Hydrated silica, SiO2·nH2O)

Greenstone / Diabase Porphyry

Porphyritic Diabase (Micro-gabbro)

Gneiss

Gneiss (High-grade metamorphic rock)

Honey Calcite

Calcite (Calcium Carbonate, CaCO3)

Gneiss

Gneiss

Quartz

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Rhodonite with Manganese Oxides

Rhodonite (Mn,Fe,Mg,Ca)SiO3

Gneiss

Gneiss

Clear Quartz

Silicon Dioxide (SiO2)

Oolitic Ironstone

Sedimentary Ooidal Ironstone (Limonite/Hematite mixture)

Yellow Calcite

Calcium Carbonate (CaCO3)

Milky Quartz or Moonstone

Silicon Dioxide (SiO2) or Potassium Aluminum Silicate (KAlSi3O8)

Orange Calcite

Calcium Carbonate (CaCO3)

Banded Agate (Chert/Chalcedony)

Silicon Dioxide (SiO2)

Yellow Calcite

Calcium Carbonate (CaCO3)

Quartz (Agate/Chalcedony variety)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Pearl

Calcium Carbonate (CaCO3) with Conchiolin

Carnelian (Chalcedony)

Silicon Dioxide (SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Onyx (Black Onyx)

Onyx (Silicon Dioxide, SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Vuggy Quartz on Matrix

Silicon Dioxide (SiO2)

Carnelian

Carnelian (Chalcedony / SiO2)

Carnelian (Red Chalcedony)

Silicon Dioxide (SiO2) with iron oxide impurities

Yellow Calcite

Calcite (Calcium Carbonate, CaCO3)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Clear Quartz

Silicon Dioxide (SiO2) / Rock Crystal

Orange Calcite

Calcite (Calcium Carbonate, CaCO3)