Rock Identifier

Category

Sedimentary (Cryptocrystalline Silica)

Browse sedimentary (cryptocrystalline silica) specimens identified by the Rock Identifier community.

Learn about Sedimentary (Cryptocrystalline Silica) in the encyclopedia

Quartzite Sandstone

Quartzite Sandstone

Tripolite

Chert

Kambaba Jasper

Tintenbar Opal

Diatomite

Ironstone

Landscape Agate

Landscape Agate

Tube Agate

Sweetwater Agate

Sweetwater Agate

Frost Agate

Coldwater Agate

Green Chert (Chert (Cryptocrystalline Quartz, SiO2)) — sedimentary

Green Chert

Chert (Cryptocrystalline Quartz, SiO2)

Chert / River Cobble (Microcrystalline Quartz (SiO2)) — sedimentary

Chert / River Cobble

Microcrystalline Quartz (SiO2)

Chert (Chert Nodule) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Chert Nodule)

Microcrystalline quartz (SiO2)

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

Chert (Nodule)

Microcrystalline Quartz (SiO2)

Jasper Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper Pebble

Microcrystalline Quartz (SiO2)

Yellow Jasper (Silicon Dioxide (SiO2) with iron impurities) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron impurities

Fancy Jasper (Agate (Silicon Dioxide, SiO2)) — sedimentary

Fancy Jasper

Agate (Silicon Dioxide, SiO2)

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

Red Jasper (Chert)

Silicon Dioxide (SiO2) with iron oxide inclusions

Chert Concretion (Silicon dioxide (SiO2)) — sedimentary

Chert Concretion

Silicon dioxide (SiO2)

Chert (Tan/Brown) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — sedimentary

Chert (Tan/Brown)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Carnelian (SiO2 (Silicon Dioxide with Iron Oxide impurities)) — gemstone

Carnelian

SiO2 (Silicon Dioxide with Iron Oxide impurities)

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

Grey and White Chert (Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert Pebble (Microcrystalline silica (SiO2)) — sedimentary

Chert Pebble

Microcrystalline silica (SiO2)

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

Chert / Flint

Microcrystalline Quartz (SiO2)

Red Jasper (Silicon Dioxide (SiO2) with Hematite (Fe2O3)) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3)

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

Chert (Nodule)

Microcrystalline Quartz (SiO2)

Agate (Silicon Dioxide (Chalcedony), SiO2) — gemstone

Agate

Silicon Dioxide (Chalcedony), SiO2

Chert (specifically brown Chert or Jasper) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (specifically brown Chert or Jasper)

Microcrystalline Quartz (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

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

Chert (Nodule)

Microcrystalline Quartz (SiO2)

Chert (Field-collected Arrowhead-shaped Fragment) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Field-collected Arrowhead-shaped Fragment)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (often called Flint in dark varieties) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint in dark varieties)

Microcrystalline or cryptocrystalline Quartz (SiO2)

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

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Tan/Grey variety) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Tan/Grey variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Fancy Jasper (Jasper (Cryptocrystalline Quartz, SiO2)) — sedimentary

Fancy Jasper

Jasper (Cryptocrystalline Quartz, SiO2)

Chert (often found as Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often found as Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Chert (Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Blue Chalcedony (Chalcedony (Silicon Dioxide, SiO2)) — mineral

Blue Chalcedony

Chalcedony (Silicon Dioxide, SiO2)

Carnelian (Silicon dioxide (chalcedony variety), SiO2) — gemstone

Carnelian

Silicon dioxide (chalcedony variety), SiO2

Blue Grey Agate Geode (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — sedimentary

Blue Grey Agate Geode

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Chert (often called Flint or Jasper) (Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)) — sedimentary

Chert (often called Flint or Jasper)

Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)

Carnelian (Silicon Dioxide (Chalcedony variety), SiO2) — gemstone

Carnelian

Silicon Dioxide (Chalcedony variety), SiO2

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Yellow Chalcedony (Carnelian / Agate Pebbles) (Silicon Dioxide (SiO2)) — mineral

Yellow Chalcedony (Carnelian / Agate Pebbles)

Silicon Dioxide (SiO2)

Yellow Chert (River Stone/Pebble) (Chert (Cryptocrystalline Quartz, SiO2)) — sedimentary

Yellow Chert (River Stone/Pebble)

Chert (Cryptocrystalline Quartz, SiO2)

Chert (Nodular flint) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Nodular flint)

Microcrystalline or cryptocrystalline Quartz (SiO2)

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

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Tumbled brown quartzite or jasper (Quartzite (mostly SiO₂), possibly iron-rich jasper (microcrystalline quartz)) — metamorphic

Tumbled brown quartzite or jasper

Quartzite (mostly SiO₂), possibly iron-rich jasper (microcrystalline quartz)

Polished carnelian (Carnelian, a red-orange variety of chalcedony (microcrystalline quartz, SiO₂)) — gemstone

Polished carnelian

Carnelian, a red-orange variety of chalcedony (microcrystalline quartz, SiO₂)

Leopard Skin Jasper or Ring Jasper (Microcrystalline Quartz (Chalcedony with impurities)) — sedimentary

Leopard Skin Jasper or Ring Jasper

Microcrystalline Quartz (Chalcedony with impurities)

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

Chert (Jasper)

Microcrystalline Quartz (SiO2)

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

Chert (River Pebble)

Microcrystalline Quartz (SiO2)