Mixed collection of Quartz varieties, Chalcedony, and metamorphic pebbles
Mixed gemstones (primarily Silicon Dioxide - SiO2)
mineral
Category
Sedimentary Rock (Technically Chert, A Microcrystalline Quartz)
Browse sedimentary rock (technically chert, a microcrystalline quartz) specimens identified by the Rock Identifier community.
Learn about Sedimentary Rock (Technically Chert, A Microcrystalline Quartz) in the encyclopedia
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Chert Nodules / Flint
Crystalline Silica (SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Chert (specifically Flint or Jasper-Chert)
Silicon Dioxide (SiO2)
sedimentary
Chert (specifically Black Chert / Flint)
Silicon Dioxide (SiO2)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Chert (Jasper)
Cryptocrystalline Quartz (SiO2)
sedimentary
Grey Agate (Tumbled)
Silicon Dioxide (SiO2)
mineral
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Flint (Chert)
Silicon dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Quartzite (Ferruginous)
SiO2 (Metamorphosed Sandstone)
metamorphic
Chert (Common Opal/Jasper transition)
Silicon Dioxide (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert / Flint
Silicon Dioxide (SiO2)
sedimentary
Shale or Slate with Quartz Veins
Shale (fine-grained clastic sedimentary rock) or Slate (low-grade metamorphic rock formed from shale) with Quartz (SiO2) veins
Metamorphic, likely Sedimentary with Quartz veins
Blue Quartzite
Quartzite (primarily SiO2 with inclusions like Dumortierite or Magnesio-riebeckite)
metamorphic
Sandstone
Arenite
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
mineralological
Sandstone
Arenite
sedimentary
Chert (varietal: Flint/Jasper)
Silicon Dioxide (SiO2)
sedimentary
Ocean Jasper
Spherulitic Chalcedony (SiO2)
mineral
Chert (Nodule)
Chert (SiO2)
sedimentary
Chert (specifically Tan/Brown Chert)
Chert (SiO2)
sedimentary
Quartzite (Iron-stained)
Metamorphosed Quartz-rich Rock (SiO2)
metamorphic
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Orange Quartzite (with Iron Staining)
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Brecciated Jasper or Chert
SiO2
Sedimentary/Metamorphic
Chert (varieties: Flint or Chalcedony)
Microcrystalline silica (SiO2)
sedimentary
Quartz (Milky/Common Quartz)
Silicon Dioxide (SiO2)
mineral
Chert / Flint
Chert (Silicon Dioxide, SiO2)
sedimentary
Yellow Quartz (Citrine Quartz variety / Ferruginous Quartz)
Silicon Dioxide (SiO2) with iron inclusions
mineral
Quartzite pebble
Quartzite (SiO2)
metamorphic
Jasper
Microcrystalline Quartz (SiO2)
Sedimentary/Mineral
Ferruginous Sandstone with Quartz Inclusions
Clastic Sedimentary Rock (Iron-rich Sandstone)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2) in a sedimentary or volcanic host
mineral
Red Quartzite / Ferruginous Sandstone
Quartzite (SiO2 with iron oxide impurities)
metamorphic
Conglomerate (or Breccia)
Clastic Sedimentary Rock
sedimentary
Smoky Quartz and Chalcedony Geode Fragment
Silicon Dioxide (SiO2)
mineral