Rock Identifier

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Common Opal

Mudstone

Green Beryl

Matte Obsidian

Sapphire

Hornfels

Argillite

Limonite (Ironstone) (Limonite (FeO(OH)·nH2O)) — sedimentary

Limonite (Ironstone)

Limonite (FeO(OH)·nH2O)

Chert (Green) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Green)

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Siltstone with Sandstone Bands (Siltstone (composed of Quartz and Clay minerals)) — sedimentary

Siltstone with Sandstone Bands

Siltstone (composed of Quartz and Clay minerals)

Chert Arrowhead (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert Arrowhead

Cryptocrystalline Quartz (SiO2)

Chert (Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper)

Silicon Dioxide (SiO2)

Basalt (Mafic Volcanic Rock) — igneous

Basalt

Mafic Volcanic Rock

Chert (Jasper) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Blue Quartz (Dumortierite Quartz) (SiO2 with inclusion of AlAl6BSi3O18) — mineral

Blue Quartz (Dumortierite Quartz)

SiO2 with inclusion of AlAl6BSi3O18

Quartzite River Pebble (Quartzite (comp: SiO2)) — metamorphic

Quartzite River Pebble

Quartzite (comp: SiO2)

Yellow Jasper (Chalcedony (SiO2 with iron oxide inclusions)) — mineral

Yellow Jasper

Chalcedony (SiO2 with iron oxide inclusions)

Green Aventurine (Silicon Dioxide (Quartz) with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)) — metamorphic

Green Aventurine

Silicon Dioxide (Quartz) with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)

Pink Dyed Agate (Silicon Dioxide (SiO2) with synthetic pigment) — mineral

Pink Dyed Agate

Silicon Dioxide (SiO2) with synthetic pigment

Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)

Ferruginous Sandstone Pebble (Arenite with Iron Oxide matrix) — sedimentary

Ferruginous Sandstone Pebble

Arenite with Iron Oxide matrix

Green Aventurine (SiO2 (Silicon Dioxide with inclusions of Fuchsite mica)) — mineral

Green Aventurine

SiO2 (Silicon Dioxide with inclusions of Fuchsite mica)

Limestone Pebble (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone Pebble

Sedimentary Calcium Carbonate (CaCO3)

Quartzite with Sandstone/Siltstone matrix (Metamorphosed Arenite (SiO2)) — metamorphic

Quartzite with Sandstone/Siltstone matrix

Metamorphosed Arenite (SiO2)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Clear Quartz (Rock Crystal) (Quartz (SiO₂)) — Mineral

Clear Quartz (Rock Crystal)

Quartz (SiO₂)

Citrine (Citrine (Silicon Dioxide, SiO2)) — mineral

Citrine

Citrine (Silicon Dioxide, SiO2)

Citrine (Silicon dioxide (SiO2)) — mineral

Citrine

Silicon dioxide (SiO2)

Chert (Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline Quartz (SiO2)

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Gold (Native Gold (Au)) — mineral

Gold

Native Gold (Au)

Chert (Arrowhead or Flake) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Arrowhead or Flake)

Microcrystalline quartz (SiO2)

Amethyst or Smoky Quartz Geode Slice (Crystalline Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst or Smoky Quartz Geode Slice

Crystalline Silicon Dioxide (SiO2) with iron impurities

Amber (Succinite (Organic Gemstone)) — mineral

Amber

Succinite (Organic Gemstone)

Chert (Jasper/Agate variant) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Agate variant)

Microcrystalline Quartz (SiO2)

Chert or Chalcedony (Microcrystalline Quartz (SiO2)) — sedimentary

Chert or Chalcedony

Microcrystalline Quartz (SiO2)

Quartzite pebble (Quartzite (primarily SiO2)) — metamorphic

Quartzite pebble

Quartzite (primarily SiO2)

Sandstone (Arenite (SiO2 predominantly)) — sedimentary

Sandstone

Arenite (SiO2 predominantly)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Limestone (containing Fossil Mold) (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone (containing Fossil Mold)

Sedimentary Calcium Carbonate (CaCO3)

Gold (Native Gold (Au)) — mineral

Gold

Native Gold (Au)

Silver (Native Element) (Ag (Native Silver), with minor Copper (Cu)) — mineral

Silver (Native Element)

Ag (Native Silver), with minor Copper (Cu)

Green Aventurine (Aventurine Quartz (SiO2 with inclusions)) — mineral

Green Aventurine

Aventurine Quartz (SiO2 with inclusions)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)