Chert (with Quartz veins)
Microcrystalline Quartz (SiO2)
sedimentary
Category
Sedimentary (Secondary Classification: Cryptocrystalline Quartz)
Browse sedimentary (secondary classification: cryptocrystalline quartz) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Secondary Classification: Cryptocrystalline Quartz) in the encyclopedia
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Chert (Nodular)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Chert (Jasper/Chalcedony variety)
Silicon Dioxide (SiO2)
sedimentary
Red Jasper with Quartz Veins
Microcrystalline Quartz (SiO2) with Hematite impurities
sedimentary
Chert (Banded Variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (containing Quartz veins)
Chert (SiO2)
sedimentary
Agate
Agate (Silicon Dioxide, SiO2)
mineral
Jasper or Chert
Silicon Dioxide (SiO2)
sedimentary
Chert with Quartz Veining
Silicon Dioxide (SiO2)
sedimentary
Dyed Agate (Tumbled)
Silicon Dioxide (SiO2) - stained microcrystalline quartz
sedimentary
Agate
Silicon Dioxide (SiO2) - variety Chalcedony
mineral
Agate (Geode nodule fragment)
Chalcedony (cryptocrystalline variety of Quartz), SiO2
mineral
Chalcedony (Yellow/Honey variety)
Microcrystalline Quartz (SiO2)
mineral
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
sedimentary
Botryoidal Chalcedony (Agate)
Cryptocrystalline Quartz (SiO2)
mineral
Chert (Jasper/Agate variant)
Microcrystalline Quartz (SiO2) with iron oxide inclusions
sedimentary
Agate Nodule (partially vuggy Quartz)
Silicon Dioxide (SiO2)
Mineral/Sedimentary
Quartz-veined Chert
Silicon dioxide (SiO2)
sedimentary
Bloodstone
Chalcedony (cryptocrystalline quartz)
Mineral/Semiprecious Stone
Chert (specifically Flint or Jasper variant)
Microcrystalline quartz (SiO2)
sedimentary
Dyed Agate
Microcrystalline Quartz (SiO2) with artificial pigment
sedimentary
Dalmatian jasper (likely orbicular microgranite)
Quartz–feldspar–biotite/pyroxene microgranite; commonly marketed as Dalmatian jasper
igneous
River Pebble (likely Quartzite or Chert)
Sedimentary Clast (Silicon Dioxide dominant)
sedimentary
Jasper (or possibly Agate/Chalcedony) beads
SiO2 (Silicon Dioxide)
mineral
Chalcedony
Silicon Dioxide (SiO2)
mineral
Bituminous Coal (with Anthracite or Vitrinite inclusion)
Organic-rich Sedimentary Rock (Carboniferous classification)
sedimentary
Red Jasper with Quartz Veining
Jasper (Silicon Dioxide, SiO2)
sedimentary
Brecciated Agate / Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Jasper with Quartz Veining
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chalcedony (Agate/Quartz pebble)
Silicon dioxide (SiO2) - Microcrystalline Quartz
mineral
Jasper with Quartz Veining
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Polished pink granite cobble
Granite, chiefly potassium feldspar, plagioclase, quartz, and biotite/hornblende
igneous
Ammonite Fossil
Ammonoidea
fossil
Jasper with Quartz Veining
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Banded Agate / Jasper (Chert Pebble)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (Septarian or Nodular variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (River Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Yellow Agate Bottle
Cryptocrystalline Silicon Dioxide (SiO2)
sedimentary
Chert (Iron-stained)
Chert (SiO2)
sedimentary
Mixed tumbled stones
Mixed mineral specimens; visible pieces may include quartz, feldspar, calcite, and other silicates
mineral
Geode (Chert or Quartz Nodule)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary