Petrified Wood
Silicified Wood (SiO2)
sedimentary
Category
Sedimentary (Microcrystalline Quartz)
Browse sedimentary (microcrystalline quartz) specimens identified by the Rock Identifier community.
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Quartz Geode Pebble
Silicon Dioxide (SiO2)
mineral
Yellow Jasper
Jasper (Silicon Dioxide with Iron Hydroxide impurities, SiO2 + FeO(OH))
sedimentary
Chert (with Quartz veins)
Chert (Microcrystalline Silica, SiO2)
sedimentary
Dalmation Stone (Dalmation Jasper)
Peralkaline Rock with Feldspar and Arfvedsonite
igneous
Chert (Flint)
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Chert (and Quartzite)
Microcrystalline silica (SiO2)
sedimentary
Jasper
Silicon Dioxide (SiO2) with impurities (mostly Iron Oxides)
sedimentary
Jasper River Pebble
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Chert (Flint)
Microcrystalline Silica (SiO2)
sedimentary
Orange Quartzite (River Pebble)
Quartzite (primarily SiO2)
metamorphic
Dalmatian Stone (often misnamed Dalmatian Jasper)
Aplite (with hornblende/arfvedsonite inclusions)
igneous
Petrified Wood
Silicified wood (Quartz/Chalcedony/SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Red Jasper
Opaque microcrystalline quartz (SiO2) with Hematite inclusions
sedimentary
Green Jasper (with Quartz veining)
Jasper (Silica-rich microcrystalline variety of Quartz), formula: SiO2
sedimentary
Chert (Jasper variety)
Cryptocrystalline quartz (SiO2)
sedimentary
Dragon Blood Jasper
Epidote-containing Quartz and Chlorite (SiO2 + (Ca2(Al, Fe)3(SiO4)3(OH)))
sedimentary
Chert
Chert (SiO2)
sedimentary
Kambaba Jasper
Stromatolite (Fossilized Algae)
sedimentary
Petrified Wood (Agatized/Silicified Wood)
Silicified Wood / Chalcedony (SiO2)
sedimentary
Red Jasper
Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)
sedimentary
Limestone with Chert
Sedimentary Rock (CaCO3 with SiO2 inclusions)
sedimentary
Carnelian
Carnelian (Chalcedony/Quartz, SiO2)
mineral
Banded Agate
Cryptocrystalline Quartz (SiO2)
mineral
Quartz Sand/Gravel
Silicon Dioxide (SiO2)
sedimentary
Chert (Quartz Variety)
Chert (SiO2)
sedimentary
Jasper
Jasper (Silica/Silicon Dioxide, SiO2)
sedimentary
Chert (Field Stone)
Chert (Silicon Dioxide, SiO2)
sedimentary
Limestone (Beach Pebble)
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Agate
SiO2
mineral
Red Jasper
Red Jasper (SiO2 with Fe2O3 inclusions)
sedimentary
Jasper and Quartz River Pebble
Silicon Dioxide (SiO2) with impurities
sedimentary
Chert (Common Opal/Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Red Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Brecciated Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Jasper
Silicon dioxide (SiO2) with impurities
sedimentary
Chert (River Pebble)
Microcrystalline silicon dioxide (SiO2)
sedimentary
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Red Jasper
Opaque microcrystalline Quartz (SiO2 with Fe2O3 inclusions)
sedimentary
Hag Stone (Holed Quartzite Pebble)
Quartzite (SiO2 based) with natural vug or erosion hole
sedimentary/metamorphic
Quartzite with inclusions or a banded chert
Quartzite or Chert
Metamorphic or Sedimentary