Quartz Druzy in Chert Pebble
Silicon Dioxide (SiO2) - Microcrystalline & Crystalline Quartz
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 (Brecciated or Veined)
Silicon Dioxide (SiO2)
sedimentary
Chalcedony (Tumbled)
Cryptocrystalline Quartz (SiO2)
mineral
Blue Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Flint
SiO2 (Cryptocrystalline Quartz)
sedimentary
Jasper
Cryptocrystalline quartz (SiO2)
Sedimentary/Mineral
Chert (Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Carnelian
Carnelian (Silicon Dioxide, SiO2)
mineral
Vesicular basalt (possible scoria)
Basaltic volcanic rock; chiefly plagioclase, pyroxene, and iron-rich minerals, with vesicles formed by trapped gas
igneous
Quartzite Cobble
Quartzite (composed primarily of SiO2)
metamorphic
Banded Agate / Lace Agate
Agate (Silica/Quartz) - SiO2
mineral
Graywacke with Quartz Veins
Argillaceous Sandstone (SiO2 composition in veins)
sedimentary
Dyed Agate
Silicon Dioxide (SiO2) with synthetic dyes
mineral
Red Jasper (with Epidote/Chlorite inclusions)
Silicon Dioxide (SiO2) with Hematite and secondary silicates
sedimentary
Chalcedony (Agate / Jasper Specimen)
Silicon Dioxide (SiO2)
mineral
Shiva Lingam (Polished Jasper)
Cryptocrystalline Quartz (SiO2) with Iron Oxide inclusions
sedimentary
Chert / Flint
Cryptocrystalline quartz (SiO2)
Sedimentary
Chert (Arrowhead Fragment)
Cryptocrystalline quartz (SiO2)
sedimentary
Chert / Flint Handaxe
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (River Siltstone/Quartzite)
Sedimentary Cryptocrystalline Quartz (SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Reddish-brown chert or jasper fragment
Microcrystalline quartz (SiO₂), likely iron-oxide-stained chert/jasper
sedimentary
Banded Agate
Cryptocrystalline Quartz (SiO2)
sedimentary
Flint
SiO2 (Cryptocrystalline Quartz)
sedimentary
Blue Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Agate (Chert/Chalcedony)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert / Flint Pebble
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert / Jasper
Cryptocrystalline Quartz (SiO2)
sedimentary
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz Geode with Agate
Silicon Dioxide (SiO2)
mineral
Blue-and-white polished stone, likely dyed howlite or turquoise imitation
Probably dyed magnesite/howlite (CaCO₃), but the image is insufficient for confirmation
mineral
Chert (specifically Iron-stained River Cobble)
Silicon Dioxide (SiO2)
sedimentary
Agate (or Chalcedony pebble)
Silicon Dioxide (SiO2)
mineral
Geode (unopened)
Calcedony-lined Geode (SiO2)
sedimentary
Agate Pebble (Desert Agate / Chalcedony Nodule)
Silicon Dioxide (SiO2)
mineral
Banded Chert
Sedimentary Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Flint Nodules)
Sedimentary cryptocrystalline quartz (SiO2)
sedimentary
Chert (Light Variety)
Sedimentary cryptocrystalline quartz (SiO2)
sedimentary
Chert (variations include Flint)
Sedimentary cryptocrystalline quartz (SiO2)
sedimentary
Yellow Chert
Sedimentary cryptocrystalline quartz (SiO2)
sedimentary