Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Category
Sedimentary Rock (Possibly Composed Of Various Minerals)
Browse sedimentary rock (possibly composed of various minerals) specimens identified by the Rock Identifier community.
Learn about Sedimentary Rock (Possibly Composed Of Various Minerals) in the encyclopedia
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Pyrite-bearing Rock
Iron Sulfide (FeS2) associated with host rock
mineral
Chalcedony
Silicon Dioxide (SiO2)
mineral
Granite
Felsic intrusive igneous rock
igneous
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Quartz Pebble
Silicon dioxide (SiO2)
sedimentary
Granodiorite
Granodiorite (Quartz-Feldspar-Biotite Plutonic Rock)
igneous
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Dalmatian Jasper
Microcrystalline Quartz with Arfvedsonite and Tourmaline inclusions
igneous
Sandstone
Arenite (primarily SiO2)
sedimentary
Green Schist
Greenschist (composed of Chlorite, Actinolite, and Epidote)
metamorphic
African Turquoise (Jasper)
Quartz (SiO2) with impurities (Epidote/Amphibole)
metamorphic
Fossiliferous Limestone
Calcareous biomicrite / Bioclastic limestone
sedimentary
K2 Jasper (K2 Granite)
Granite with Azurite inclusions (SiO2 + Cu3(CO3)2(OH)2)
igneous
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Sandstone
Arenite
Sedimentary
Pebble (likely Quartz or Chert)
SiO₂ (Silicon Dioxide) - referring to the likely main mineral composition, Quartz. If it's chert, the scientific name remains SiO₂ with a microcrystalline structure.
Sedimentary Rock
Schist
Schist (various mineralogical compositions including mica, chlorite, talc, etc.)
Metamorphic
Sandstone with Trace Fossils
Quartz Arenite with Bioturbation (Trace Fossils)
sedimentary
Quartz (Milky/Clear Quartz)
Silicon Dioxide (SiO2)
mineral
White Marble
Recrystallized Calcite (CaCO3)
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Tumbled quartz-rich stone, likely milky quartz
Quartz (SiO₂), possibly iron-stained milky quartz or quartzite
mineral
Chert (White Chert / Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Jasper
Silicon dioxide (SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Chert (varietal: Flint Pitted Pebble)
Cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Greenstone
Metabasalt (composed of chlorite, epidote, and actinolite)
metamorphic
Shiva Lingam
Cryptocrystalline Quartz (Jasperiod Siltstone)
sedimentary
Granite Pebble
Intrusive Igneous Rock
igneous
Sandstone
Clastic sedimentary rock (primarily quartz arenite)
sedimentary
Sandstone (Yellow/Tan)
Clastic sedimentary rock (primarily SiO2 with iron oxide staining)
sedimentary
Marble
Metamorphosed Limestone (CaCO3)
metamorphic
Gravel and Pebbles
Unconsolidated rock fragments (clastic sediment)
sedimentary
Hag Stone
Perforated sedimentary rock (typically flint, chert, or limestone)
sedimentary
Sandstone (with cross-bedding)
Arenite (composed primarily of Quartz: SiO2)
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (likely Siltstone or Mudstone)
Clastic sedimentary rock (primarily SiO2 with various oxides)
sedimentary
Pearl
Aragonite and Conchiolin (CaCO3 + organic protein)
mineraloid
Opalite
Synthetic Glass (Simulated Opal)
gemstone