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
Category
Mineral Or Sedimentary (If Chert)
Browse mineral or sedimentary (if chert) specimens identified by the Rock Identifier community.
Learn about Mineral Or Sedimentary (If Chert) in the encyclopedia
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Banded Iron Formation
Banded Iron Formation (BIF)
sedimentary
Banded Iron Formation (BIF)
Banded Iron Formation (Fe2O3 + SiO2)
sedimentary
Chert (Jasper/Opaline variety)
Silicon Dioxide (SiO2)
sedimentary
Weathered iron-rich chert or jasper
Microcrystalline quartz (SiO₂), variably stained by iron oxides/hydroxides
sedimentary
Red jasper (likely iron-rich chert)
Microcrystalline quartz, SiO₂, colored by iron oxides
sedimentary
Weathered iron-rich chert or ferruginous quartzite
Microcrystalline quartz (SiO₂), stained/coated by iron oxides such as goethite and hematite
sedimentary
Banded Chert / Flint Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Hag Stone
Calcareous sedimentary rock (often Chert, Flint, or Limestone)
sedimentary
Jasper / Chert (Red)
Cryptocrystalline quartz (SiO2)
Sedimentary / Mineral
Small brown pebble (likely iron-stained quartz or chert)
Undetermined silicate pebble; possible quartz (SiO₂) or chert (microcrystalline SiO₂)
sedimentary
Yellow chert or jasper pebble
Microcrystalline quartz (SiO₂), likely iron-oxide-stained chert/jasper
sedimentary
Chert (Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Polished brecciated iron-rich rock, possibly jasper or chert
Brecciated silica-rich rock; likely microcrystalline quartz (SiO₂) with iron-oxide minerals
sedimentary
Chert Nodules in Limestone
Microcrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)
sedimentary
Jasper (likely red/brown jasper)
Microcrystalline quartz/chalcedony, SiO₂, colored mainly by iron oxides
mineral
Tumbled red jasper
Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides
mineral
Chert / River Pebble
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Flint variety)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Chert (varietal Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (River Stone)
Microcrystalline Quartz (SiO2)
sedimentary
Chert / River Cobble
Microcrystalline Quartz (SiO2)
sedimentary
Chert (specifically Jasper/Carnelian Agate)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint variety)
Microcrystalline context of Quartz (SiO2)
sedimentary
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (specifically Banded Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Banded Flint (Polished Stripe Flint)
Silicon Dioxide (SiO2) - variety of Chert
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Weathered chert or siliceous limestone
Microcrystalline quartz (SiO₂), possibly replacing or cementing carbonate rock
sedimentary
Chert Nodules in Limestone
Microcrystalline Quartz (SiO2) in Carbonate Matrix
sedimentary
Chert (Arrowhead Fragment)
Microcrystalline Quartz (SiO2)
sedimentary
Red jasper pebble
Jasper, microcrystalline quartz (SiO₂) colored primarily by iron oxides
sedimentary
Chert (Green variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline quartz (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Limestone with Chert Nodule
Carbonate rock (CaCO3) with Microcrystalline Silicon Dioxide (SiO2) inclusion
sedimentary
Tumbled jasper or chert pebble
Microcrystalline quartz, mainly SiO₂, likely jasper/chert
mineral
Chert (Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (variations include Flint/Chalcedony)
Chert (SiO2 - Silicon Dioxide)
sedimentary