Quartz / Chert
Silicon Dioxide (SiO2)
Mineral / Sedimentary
Category
Mineral (Or Mineraloid If Microcrystalline)
Browse mineral (or mineraloid if microcrystalline) specimens identified by the Rock Identifier community.
Learn about Mineral (Or Mineraloid If Microcrystalline) in the encyclopedia
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Green Jasper
Silicon Dioxide (SiO2) with iron silicate inclusions
sedimentary
Chalcedony Agate / Carnelian nodules in Matrix
SiO2 (Silicon Dioxide) with iron oxide inclusions
mineral
Jasper
Jasper (Silicon Dioxide, SiO2)
mineral
Leopard Skin Jasper
Silicon Dioxide (SiO2) with various inclusions
sedimentary
Poppy Jasper
Microcrystalline Quartz (SiO2) with mineral inclusions
sedimentary
Chert (Nodular)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Red Jasper Concretion
Cryptocrystalline Quartz (SiO2)
sedimentary
Jasper (Banded Jasper / Chert)
Silicon Dioxide (SiO2 with iron oxide inclusions)
sedimentary
Yellow Quartz (Citrine or Yellow Jasper)
Silicon Dioxide (SiO2) with iron impurities
mineral
Quartz Geode (Cracked)
Quartz (Silicon Dioxide, SiO2)
sedimentary
Agate (Polished Nodule)
Agate (Silicon Dioxide, SiO2)
mineral
Yellow Jasper
Tectosilicates (SiO2) with Goethite/Iron oxide inclusions
sedimentary
Brecciated jasper (likely ocean jasper or red jasper)
Microcrystalline quartz, SiO₂, with iron-oxide pigments and breccia cement
mineral
Red jasper (likely brecciated or orbicular jasper)
Microcrystalline quartz, SiO₂, colored mainly by iron oxides
mineral
Quartz (or Chalcedony) Specimen
Silicon Dioxide (SiO2)
mineral
Leopard Skin Jasper
Silicon Dioxide (SiO2) with mineral inclusions
mineral
Quartz Pebble (Chalcedony/Agate)
Silicon Dioxide (SiO2)
Mineral
Polished multicolored jasper
Jasper, an opaque microcrystalline variety of quartz (SiO₂), likely iron- and manganese-stained chert
mineral
Bumblebee Jasper
Fibrous Calcite with Arsenic and Sulfur Inclusions
gemstone
Red Jasper
Silicon Dioxide with Iron Oxide (SiO2)
mineral
Opalite
Synthetically produced glass (Silicon Dioxide with metallic inclusions)
Mineraloid (Man-made Glass)
Geode
Quartz nodule / Chalcedony-lined cavity
sedimentary
Agate
SiO2
Mineral
Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock pebble
sedimentary
Vesicular Basalt with Calcification
Vesicular Basalt (Aphanitic extrusive igneous rock)
igneous
Dinosaur Fossil (Tyrannosaurus rex skull replica/specimen)
Tyrannosaurus rex (fossilized in permineralized sedimentary matrix)
sedimentary
Landscape Jasper
SiO2
Mineral
Dalmatian Jasper
Feldspar porphyry (Microcline and Quartz with Arfvedsonite spots)
igneous
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Shark Tooth Fossil
Chondrichthyes (class) fossilized tooth
fossil
Quartz Pebble (Chert/Chalcedony)
Silicon Dioxide (SiO2)
mineral
Agate (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Bumblebee Jasper
Fossiliferous Volcanic Rock (composed of Calcium Carbonate, Manganese Oxides, and Arsenic Sulfides)
igneous
Red jasper pebble
Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides
mineral
Polished red jasper
Jasper, a microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides
mineral
Red jasper (likely polished/tumbled)
Microcrystalline quartz/chalcedony, SiO₂, colored mainly by iron oxides
mineral
Chalcedony (Agate / Quartz Pebble)
Silicon Dioxide (SiO2)
mineral
Tumbled reddish-brown stone, likely jasper
Jasper (microcrystalline quartz, SiO₂), possibly red jasper or jasper-rich chert
mineral
Leopard Jasper
Microcrystalline Quartz (SiO2) with mineral inclusions
sedimentary
Tumbled jasper pebble
Jasper, microcrystalline quartz (SiO₂) with iron-oxide impurities
mineral