Man Made Object (Simulant)

Quartz (Rose Quartz)

Silicon Dioxide (SiO2)

Agate Geode

Silicon Dioxide (SiO2) - Chalcedony variety

Quartz

Silicon Dioxide (SiO2)

Epidote

Epidote (Ca2(Al, Fe)3(SiO4)3(OH))

Quartz

Silicon Dioxide (SiO2)

Green Jasper / Green Quartz

Silicon dioxide (SiO2) with mineral impurities

Quartz

Silicon Dioxide (SiO2)

Obsidian

Volcanic Glass (Amorphous Silicon Dioxide)

Quartz Pebble

Silicon Dioxide (SiO2)

Jasper

Silicon Dioxide (Microcrystalline Quartz), SiO2

Green Jasper

Microcrystalline Quartz (SiO2) with impurities

Green Aventurine

SiO2

Agate

Silicon dioxide (Chalcedony), SiO2

Rose Quartz

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

Jasper

Silicon Dioxide (Microcrystalline Quartz), SiO2

Ammonite Fossil

Ammonoidea

Agate

Silicon Dioxide (Chalcedony), SiO2

Red Jasper

Silicon Dioxide (SiO2), microcrystalline quartz variety

Jasper

Microcrystalline quartz (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz (Water-worn Pebbles)

Silicon Dioxide (SiO2)

Agate

Silicon Dioxide (Chalcedony), SiO2

Quartz Geode

Silicon Dioxide (SiO2)

Agate

Silicon dioxide (Chalcedony variety)

Jasper

Microcrystalline Quartz (SiO2)

White Quartz

Silicon Dioxide (SiO2)

Jade Dice

Nephrite / Jadeite (Ca2(Mg,Fe)5Si8O22(OH)2 or NaAlSi2O6)

Jasper Pebble

Microcrystalline Quartz (SiO2)

Tiger's Eye (Brown/Golden)

Silicon dioxide (Quartz pseudomorph after crocidolite), SiO2

Jasper

Microcrystalline Quartz (SiO2)

Agate

Silicon Dioxide (Chalcedony), SiO2

Amethyst

SiO2 (Silicon Dioxide with Fe3+ impurities)

Jasper

Cryptocrystalline quartz (SiO2)

Sea Glass

Amorphous silicon dioxide (glass)

Chert

Chert (Microcrystalline Quartz)

Basalt

Basalt

Quartzite pebble

Quartzite (SiO2)

Yellow Calcite

Calcium Carbonate (CaCO3)

Yellow Calcite

Calcite (CaCO3)

Chert

Silicon dioxide (SiO2)

Quartzite

Metamorphic Quartzite (SiO2)

Quartzite

Metamorphic Quartz Sandstone