Rock Identifier

Category

Sedimentary (Secondary Classification: Cryptocrystalline Quartz)

Browse sedimentary (secondary classification: cryptocrystalline quartz) specimens identified by the Rock Identifier community.

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

metamorphic
Sandstone with Ironstone Banding (Clastic Sandstone (composed of Quartz with Hematite/Limonite bonding)) — sedimentary

Sandstone with Ironstone Banding

Clastic Sandstone (composed of Quartz with Hematite/Limonite bonding)

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

Milky Quartz

Silicon Dioxide (SiO2)

mineral
Sandstone (Arenite (composed primarily of Quartz, SiO2)) — sedimentary

Sandstone

Arenite (composed primarily of Quartz, SiO2)

sedimentary
Conglomerate (Clastic Sedimentary (Conglomerate)) — sedimentary

Conglomerate

Clastic Sedimentary (Conglomerate)

sedimentary
Chert (variations include Flint) (Chert (SiO2)) — sedimentary

Chert (variations include Flint)

Chert (SiO2)

sedimentary
Sandstone (likely Quartzose Sandstone) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (likely Quartzose Sandstone)

Arenite (composed primarily of SiO2)

sedimentary
Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

sedimentary
Sandstone (Clastic Sedimentary Rock (composed mostly of quartz and/or feldspar)) — sedimentary

Sandstone

Clastic Sedimentary Rock (composed mostly of quartz and/or feldspar)

sedimentary
Chert / Flint Nodules in Sandstone (Microcrystalline Quartz (SiO2) within Clastic Sedimentary Rock) — sedimentary

Chert / Flint Nodules in Sandstone

Microcrystalline Quartz (SiO2) within Clastic Sedimentary Rock

sedimentary
Sandstone (with Iron Staining) (Clastic sedimentary rock (primarily Quartz with Fe2O3 staining)) — sedimentary

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily Quartz with Fe2O3 staining)

sedimentary
Sandstone Pebble with Iron Staining (Clastic Sedimentary Rock (primarily Quartz with Fe2O3 oxides)) — sedimentary

Sandstone Pebble with Iron Staining

Clastic Sedimentary Rock (primarily Quartz with Fe2O3 oxides)

sedimentary
Zebra Jasper (Zebra Stone) (Tumbled Silicon Dioxide (SiO2) with impurities) — sedimentary

Zebra Jasper (Zebra Stone)

Tumbled Silicon Dioxide (SiO2) with impurities

sedimentary
Sandstone (Arenite (predominantly Quartz Sandstone)) — sedimentary

Sandstone

Arenite (predominantly Quartz Sandstone)

sedimentary
Zebra Jasper (Silicon Dioxide (SiO2) with impurities; typically a form of Chalcedony/Microcrystalline Quartz) — sedimentary

Zebra Jasper

Silicon Dioxide (SiO2) with impurities; typically a form of Chalcedony/Microcrystalline Quartz

sedimentary
Conglomerate (or Breccia) (Clastic Sedimentary Rock) — sedimentary

Conglomerate (or Breccia)

Clastic Sedimentary Rock

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

Jasper

Silicon dioxide (SiO2) with impurities

sedimentary
Chert (and Flint) (Chert (SiO2)) — sedimentary

Chert (and Flint)

Chert (SiO2)

sedimentary
Quartz Geode (Silicon Dioxide (SiO2)) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2)

sedimentary
Quartz Geode (Crystalline Silicon Dioxide (SiO2) within a nodule) — sedimentary

Quartz Geode

Crystalline Silicon Dioxide (SiO2) within a nodule

sedimentary
Quartz Geode (Silicon Dioxide (SiO2) within a geode) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2) within a geode

sedimentary
Quartz Geode (Silicon Dioxide (SiO2) in a concretionary structure) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2) in a concretionary structure

sedimentary
Clear Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

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

Milky Quartz

Silicon Dioxide (SiO2)

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

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

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

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

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

Clear Quartz

Silicon Dioxide (SiO2)

mineral
Quartz (Milky or Rough Variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Rough Variety)

Silicon Dioxide (SiO2)

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

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

mineral
Quartz (on matrix) (Quartz (Silicon Dioxide, SiO₂)) — Mineral

Quartz (on matrix)

Quartz (Silicon Dioxide, SiO₂)

Mineral
Quartz / Common Opal Transition (Silicon Dioxide (SiO2)) — mineral

Quartz / Common Opal Transition

Silicon Dioxide (SiO2)

mineral
Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

sedimentary
Sandstone (Red/Brown Variety) (Arenite (SiO2 with iron oxide impurities)) — sedimentary

Sandstone (Red/Brown Variety)

Arenite (SiO2 with iron oxide impurities)

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

Quartz Geode

Silicon Dioxide (SiO2)

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

Milky Quartz

Silicon Dioxide (SiO2)

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

Quartz Geode

Silicon Dioxide (SiO2)

mineral
Clear Quartz (Silicon dioxide (SiO2)) — mineral

Clear Quartz

Silicon dioxide (SiO2)

mineral
Kyanite in Quartz (Kyanite (Al2SiO5) with Quartz (SiO2)) — metamorphic

Kyanite in Quartz

Kyanite (Al2SiO5) with Quartz (SiO2)

metamorphic
Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

mineral
Quartz Geode (Clear Quartz (Silicon Dioxide, SiO2)) — mineral

Quartz Geode

Clear Quartz (Silicon Dioxide, SiO2)

mineral
Blue Apatite (Apatite (Group), Ca5(PO4)3(F,Cl,OH)) — mineral

Blue Apatite

Apatite (Group), Ca5(PO4)3(F,Cl,OH)

mineral
Sandstone (Arenite (Clastic Sedimentary Rock)) — sedimentary

Sandstone

Arenite (Clastic Sedimentary Rock)

sedimentary