Fossilized Brachiopod
Phylum Brachiopoda (General mineral composition: Calcite/CaCO₃ or Silica/SiO₂)
sedimentary
Category
Sedimentary (Microcrystalline Quartz)
Browse sedimentary (microcrystalline quartz) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Microcrystalline Quartz) in the encyclopedia
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Jasper with Quartz Veining
Silicon Dioxide (SiO2) with impurities
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Iron impurities
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified Wood
Silicified wood (Quartz variant, SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Jasper with Iron Staining
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Picture Jasper
Silicon Dioxide (SiO2) with mineral inclusions
sedimentary
Banded Iron Formation (Jaspillite)
Banded Iron Formation (BIF)
sedimentary
Sandstone with Secondary Mineral Encrustation
Arenite with Silica/Calcite deposits (SiO2 or CaCO3)
sedimentary
Chert (with Quartz Veining)
Chert (formula: SiO2)
sedimentary
Chert (Brecciated Chert)
Silicon Dioxide (SiO2)
sedimentary
Blue Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
sedimentary
Carnelian
Carnelian (Chert/Chalcedony variety of Quartz, SiO2)
mineral
Chalcedony (Agate/Carnelian variety)
Cryptocrystalline Quartz (SiO2)
mineral
Red Brecciated Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Chrysocolla in Quartz
Chrysocolla (Cu,Al)2H2Si2O5(OH)4·nH2O in Quartz (SiO2)
gemstone
Chert (Jasper)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Green variety)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Common Chert)
Cryptocrystalline Quartz (SiO2)
sedimentary
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Chert / Jasper
Silicon Dioxide (SiO2)
sedimentary
Dinosaur Fossil (Skull)
Dinosauria fossilis (Petrified Hydroxyapatite / Calcium Carbonate)
sedimentary
Chert (Golden/Yellow Variety)
Microcrystalline Silica (SiO2)
sedimentary
Petrified Wood
Silicified wood (Quartz/Chalcedony)
Sedimentary
Chert / Flint Nodules
Cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone Concretion
Clastic Sedimentary Concretion (typically Quartz/Silica with Iron Oxide)
sedimentary
Dalmatian Jasper
Peralkaline Quartz-Feldspar Porphyritic Rock (Dalmatian Stone)
igneous
Chalcedony (Agate/Quartz pebble)
Silicon dioxide (SiO2) - Microcrystalline Quartz
mineral
Jasper
Silicon dioxide (SiO2)
Mineral / Sedimentary
Chert (specifically Flint or Jasper variant)
Microcrystalline silica (SiO2)
sedimentary
Red Jasper
Chalcedony/Quartz (SiO2) with iron inclusions
mineral
Red Jasper
Silicon dioxide (microcrystalline quartz with iron oxide inclusions), SiO2
sedimentary
Jasper
Silicon dioxide (SiO2)
sedimentary
White Agate (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Agatized Fossil (Druzy Agate)
Silicon Dioxide (SiO2) replacing organic matter
sedimentary
Agate and Amethyst (Quartz variants)
Silicon Dioxide (SiO2) - Microcrystalline Quartz and Crystalline Quartz
mineral
Red Jasper with Quartz Veining
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Concretion with Quartz Veining
Septarian Concretion (CaCO3 / SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Chert (Mookaite style Jasper)
Microcrystalline Quartz (SiO2) with Hematite/Goethite inclusions
sedimentary