Rock Identifier

Category

Mineral (Specifically A Cryptocrystalline Variety Of Quartz)

Browse mineral (specifically a cryptocrystalline variety of quartz) specimens identified by the Rock Identifier community.

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Quartz Geode (Silicon Dioxide (SiO2) within a secondary sedimentary structure) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2) within a secondary sedimentary structure

Petrified Wood (Silicified Wood (primarily SiO2 - Silicon Dioxide)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2 - Silicon Dioxide)

Banded Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Microcrystalline Quartz (SiO2)

Orca Agate (Chalcedony (Microcrystalline Quartz, SiO2)) — sedimentary

Orca Agate

Chalcedony (Microcrystalline Quartz, SiO2)

Greenstone / Greenschist (Chlorite schist / Meta-basalt) — metamorphic

Greenstone / Greenschist

Chlorite schist / Meta-basalt

Quartz Geode Fragment (Silicon Dioxide (SiO2)) — mineral

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Banded Calcite (often sold as Mexican Onyx) (Calcium Carbonate (CaCO3)) — mineral

Banded Calcite (often sold as Mexican Onyx)

Calcium Carbonate (CaCO3)

Citrine Quartz (Silicon Dioxide (SiO2) with iron impurities) — mineral

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

Pyrite in Matrix (Iron Sulfide (FeS2)) — mineral

Pyrite in Matrix

Iron Sulfide (FeS2)

Jasper (Silicon dioxide (SiO2)) — Sedimentary / Mineral

Jasper

Silicon dioxide (SiO2)

Sedimentary / Mineral

Smoky Quartz (Quartz (SiO₂)) — Mineral

Smoky Quartz

Quartz (SiO₂)

Milky Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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

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

Clear Quartz (or Rock Crystal)

Quartz (SiO₂)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Chalcedony (Agate/Chert variety) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agate/Chert variety)

Silicon Dioxide (SiO2)

Jasper (specifically Yellow or Picture Jasper) (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Jasper (specifically Yellow or Picture Jasper)

Silicon Dioxide (SiO2) with iron oxide inclusions

Quartz (Amethyst variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Amethyst variety)

Silicon Dioxide (SiO2)

Agate (Silicon dioxide (SiO2)) — mineral

Agate

Silicon dioxide (SiO2)

Chert (Flint) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

Chert (specifically Flint or Jasper variant) (Silicon Dioxide (SiO2)) — sedimentary

Chert (specifically Flint or Jasper variant)

Silicon Dioxide (SiO2)

Chert (specifically White Chert or Novaculite) (Silicon Dioxide (SiO₂)) — sedimentary

Chert (specifically White Chert or Novaculite)

Silicon Dioxide (SiO₂)

Quartz pebble (Silicon Dioxide (SiO2)) — mineral

Quartz pebble

Silicon Dioxide (SiO2)

Dendritic Agate or Tree Agate (Silicon Dioxide (SiO2) with impurities of manganese or iron oxide) — mineral

Dendritic Agate or Tree Agate

Silicon Dioxide (SiO2) with impurities of manganese or iron oxide

Rose Quartz (SiO2 (Silicon Dioxide)) — mineral

Rose Quartz

SiO2 (Silicon Dioxide)

Mixed Gemstone Beaded Jewelry (Various minerals (e.g., Quartz varieties like Rose Quartz, Amethyst; Peridot; Garnet; etc.)) — Mineral

Mixed Gemstone Beaded Jewelry

Various minerals (e.g., Quartz varieties like Rose Quartz, Amethyst; Peridot; Garnet; etc.)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Mixed Gemstone Collection (SiO2 (Quartz varieties) and Biogenic CaCO3 (Nacre)) — mineral

Mixed Gemstone Collection

SiO2 (Quartz varieties) and Biogenic CaCO3 (Nacre)

Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Rose Quartz (Rose Quartz (SiO2)) — Mineral

Rose Quartz

Rose Quartz (SiO2)

Quartz with inclusions (SiO2) — mineral

Quartz with inclusions

SiO2

Chert (includes Flint & Jasper) (Chert (Siliceous sedimentary rock, chemical formula SiO2)) — sedimentary

Chert (includes Flint & Jasper)

Chert (Siliceous sedimentary rock, chemical formula SiO2)

Blue Quartzite (Dyed) (Silicon Dioxide (SiO2) with inclusions) — metamorphic

Blue Quartzite (Dyed)

Silicon Dioxide (SiO2) with inclusions

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Mahogany Obsidian (Volcanic Glass (SiO2 + Fe2O3)) — igneous

Mahogany Obsidian

Volcanic Glass (SiO2 + Fe2O3)

Moss Agate (Silicon dioxide (SiO2) with inclusions of hornblende or chlorite) — mineral

Moss Agate

Silicon dioxide (SiO2) with inclusions of hornblende or chlorite

Amethyst (Silicon Dioxide with iron impurities (SiO2)) — mineral

Amethyst

Silicon Dioxide with iron impurities (SiO2)

Quartz (Quartzite fragment) (Silicon Dioxide (SiO2)) — mineral

Quartz (Quartzite fragment)

Silicon Dioxide (SiO2)

Jasper (Silicon dioxide (SiO2) with impurities) — sedimentary

Jasper

Silicon dioxide (SiO2) with impurities

Agate (Common Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Agate (Common Chalcedony)

Silicon Dioxide (SiO2)