Rock Identifier

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Red Jasper (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Quartzite (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Chert (Lake Superior Agate variant) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Lake Superior Agate variant)

Microcrystalline Quartz (SiO2)

Aventurine (Green) (Silicon Dioxide (Quartz variety) containing Fuchsite - SiO2 + K(Al,Cr)2AlSi3O10(OH)2) — mineral

Aventurine (Green)

Silicon Dioxide (Quartz variety) containing Fuchsite - SiO2 + K(Al,Cr)2AlSi3O10(OH)2

Chert (Yellow Jasper variant) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (Yellow Jasper variant)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Rose Quartz (Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese) — mineral

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese

Red Jasper (Chert) (Silicon dioxide (SiO2) with iron oxide inclusions) — sedimentary

Red Jasper (Chert)

Silicon dioxide (SiO2) with iron oxide inclusions

Weathered Quartzite or Chert Pebble (Silicon Dioxide (SiO2)) — metamorphic or sedimentary

Weathered Quartzite or Chert Pebble

Silicon Dioxide (SiO2)

metamorphic or sedimentary

Chrysoprase (Chalcedony (cryptocrystalline silica containing nickel); Chemical Formula: SiO2 with Ni impurities) — mineral

Chrysoprase

Chalcedony (cryptocrystalline silica containing nickel); Chemical Formula: SiO2 with Ni impurities

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

Chert (Flint)

Cryptocrystalline Quartz (SiO2)

Tourmalinated Quartz (Silicon dioxide (SiO2) with inclusions of Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)) — mineral

Tourmalinated Quartz

Silicon dioxide (SiO2) with inclusions of Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)

Amethyst (Quartz (SiO2) with trace iron impurities) — Mineral

Amethyst

Quartz (SiO2) with trace iron impurities

Red Garnet (Almandine Garnet (Fe3Al2(SiO4)3)) — mineral

Red Garnet

Almandine Garnet (Fe3Al2(SiO4)3)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Chert (Flint Nodules) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Flint Nodules)

Cryptocrystalline Quartz (SiO2)

Moss Agate (Silicon Dioxide (SiO2) with inclusions) — mineral

Moss Agate

Silicon Dioxide (SiO2) with inclusions

Argetine Blue Agate (Chalcendony variant) (Silicon Dioxide (SiO₂)) — mineral

Argetine Blue Agate (Chalcendony variant)

Silicon Dioxide (SiO₂)

Green Aventurine (Fuchsite-bearing Quartz) (Silicon Dioxide with Chromium-rich Muscovite (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)) — metamorphic

Green Aventurine (Fuchsite-bearing Quartz)

Silicon Dioxide with Chromium-rich Muscovite (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Chert (Iron-stained) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Bicolor Quartz (Milk Quartz with Slag or Dark Inclusions) (Silicon Dioxide (SiO2) with impurities) — mineral

Bicolor Quartz (Milk Quartz with Slag or Dark Inclusions)

Silicon Dioxide (SiO2) with impurities

Sandstone (Water-worn Cobble) (Arenite (variable composition, primarily SiO2)) — sedimentary

Sandstone (Water-worn Cobble)

Arenite (variable composition, primarily SiO2)

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — metamorphic

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Quartz (Druzy Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Druzy Quartz)

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Yellow Jasper (Chert)

Silicon Dioxide (SiO2)

River Pebbles and Quartz (Mixed Igneous, Sedimentary, and Metamorphic Rocks (Silicon Dioxide SiO2 dominant)) — mixed

River Pebbles and Quartz

Mixed Igneous, Sedimentary, and Metamorphic Rocks (Silicon Dioxide SiO2 dominant)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Chert (White Chert / Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (White Chert / Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Basalt (Basalt (Mafic Extrusive Igneous Rock)) — igneous

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Milky Quartz with Iron Staining (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Carnelian (Carnelian (a variety of Chalcedony); SiO2 (Silicon Dioxide)) — mineral

Carnelian

Carnelian (a variety of Chalcedony); SiO2 (Silicon Dioxide)

Ironstone Concretion (Limonite/Goethite) (Iron oxide concretion (contains FeO(OH)·nH2O)) — sedimentary

Ironstone Concretion (Limonite/Goethite)

Iron oxide concretion (contains FeO(OH)·nH2O)

Quartzite Pebble (Quartzite (composed primarily of Silica, SiO2)) — metamorphic

Quartzite Pebble

Quartzite (composed primarily of Silica, SiO2)

Chert (River Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (River Pebble)

Microcrystalline Quartz (SiO2)

Pink Tumbled Quartz (Dyed) (Silicon Dioxide (SiO2)) — mineral

Pink Tumbled Quartz (Dyed)

Silicon Dioxide (SiO2)

Pink Quartzite (Quartzite (mainly SiO2 with iron oxide impurities)) — metamorphic

Pink Quartzite

Quartzite (mainly SiO2 with iron oxide impurities)

Sandstone Chert Concretion (Silica-cemented Concretion (primarily SiO2)) — sedimentary

Sandstone Chert Concretion

Silica-cemented Concretion (primarily SiO2)

Tiger's Eye (Pseudomorph of quartz after crocidolite (SiO2)) — metamorphic

Tiger's Eye

Pseudomorph of quartz after crocidolite (SiO2)

Chert (and/or Chalcedony) (Microcrystalline Silica (SiO2)) — sedimentary

Chert (and/or Chalcedony)

Microcrystalline Silica (SiO2)

Chert (and Quartz Gravel) (Chert (Cryptocrystalline Quartz, SiO2)) — sedimentary

Chert (and Quartz Gravel)

Chert (Cryptocrystalline Quartz, SiO2)