Rock Identifier

Category

Sedimentary (Secondary Classification: Cryptocrystalline Quartz)

Browse sedimentary (secondary classification: cryptocrystalline quartz) specimens identified by the Rock Identifier community.

Jasper (Iron-stained) (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Jasper (Iron-stained)

Silicon Dioxide (SiO2) with iron oxide inclusions

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Limonite/Hematite Ironstone (Goethite-rich Ironstone (FeO(OH) · nH2O)) — sedimentary

Limonite/Hematite Ironstone

Goethite-rich Ironstone (FeO(OH) · nH2O)

Specular Hematite (Specularite) (Iron(III) oxide (Fe2O3)) — mineral

Specular Hematite (Specularite)

Iron(III) oxide (Fe2O3)

Turquoise (Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]) — mineral

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Honey Calcite (Calcium Carbonate (CaCO3)) — mineral

Honey Calcite

Calcium Carbonate (CaCO3)

Optical Calcite (Iceland Spar) (Calcium Carbonate (CaCO3)) — mineral

Optical Calcite (Iceland Spar)

Calcium Carbonate (CaCO3)

Ironstone with Limonite/Goethite coating (Ferruginous Sedimentary Rock (contains Limonite FeO(OH)·nH2O)) — sedimentary

Ironstone with Limonite/Goethite coating

Ferruginous Sedimentary Rock (contains Limonite FeO(OH)·nH2O)

Quartz with Limonite Staining (Silicon Dioxide (SiO2) with Hydrated Iron Oxide (FeO(OH)·nH2O)) — Mineral

Quartz with Limonite Staining

Silicon Dioxide (SiO2) with Hydrated Iron Oxide (FeO(OH)·nH2O)

Purple Lepidolite with Quartz (Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)) — mineral

Purple Lepidolite with Quartz

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Red Jasper (Tumbled) (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary/mineral

Red Jasper (Tumbled)

Silicon Dioxide (SiO2) with iron oxide inclusions

sedimentary/mineral

Petrified Wood (Silicified Wood (SiO2)) — metamorphic

Petrified Wood

Silicified Wood (SiO2)

Gold and Silver (in jewelry form) (Gold (Au) and Silver (Ag)) — mineral

Gold and Silver (in jewelry form)

Gold (Au) and Silver (Ag)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Prasiolite (Silicon Dioxide (SiO2) with iron impurities) — mineral

Prasiolite

Silicon Dioxide (SiO2) with iron impurities

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Iron-stained Quartzite (Quartzite with Limonite/Hematite staining (SiO2 with FeO(OH)·nH2O)) — metamorphic

Iron-stained Quartzite

Quartzite with Limonite/Hematite staining (SiO2 with FeO(OH)·nH2O)

Quartzite with Iron Staining (Quartzite (primarily SiO2 with Fe2O3 staining)) — metamorphic

Quartzite with Iron Staining

Quartzite (primarily SiO2 with Fe2O3 staining)

Amygdaloidal Basalt (Amygdaloidal Basalt) — igneous

Amygdaloidal Basalt

Amygdaloidal Basalt

Amygdaloidal Rhyolite (Amygdaloidal felsic extrusive rock) — igneous

Amygdaloidal Rhyolite

Amygdaloidal felsic extrusive rock

Jasper (Iron-stained Quartz) (Silicon dioxide (SiO2) with iron oxide inclusions) — sedimentary

Jasper (Iron-stained Quartz)

Silicon dioxide (SiO2) with iron oxide inclusions

Red Jasper (Jasper (Silicon Dioxide: SiO2 with Iron oxide inclusions)) — sedimentary

Red Jasper

Jasper (Silicon Dioxide: SiO2 with Iron oxide inclusions)

Jasper (Jasper (Silica/Silicon Dioxide, SiO2)) — sedimentary

Jasper

Jasper (Silica/Silicon Dioxide, SiO2)

Orange Quartzite / Carnelian Agate (Silicon Dioxide (SiO2)) — metamorphic

Orange Quartzite / Carnelian Agate

Silicon Dioxide (SiO2)

Quartzite with Hematite staining (Quartzite (SiO2) with iron oxide inclusions) — metamorphic

Quartzite with Hematite staining

Quartzite (SiO2) with iron oxide inclusions

Quartzite with Iron inclusions (Metamorphosed Sandstone (SiO2 with Fe2O3)) — metamorphic

Quartzite with Iron inclusions

Metamorphosed Sandstone (SiO2 with Fe2O3)

Gold (Native Gold (Au)) — mineral

Gold

Native Gold (Au)

Ferruginous Quartz (Iron-stained Quartz (Silicon Dioxide, SiO2 with Fe2O3 inclusions)) — mineral

Ferruginous Quartz

Iron-stained Quartz (Silicon Dioxide, SiO2 with Fe2O3 inclusions)

Milky Quartz with Iron Staining (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Dendritic Jasper (Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions) — sedimentary

Dendritic Jasper

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

Quartz Geode (partially formed/chalcedony with iron staining) (Quartz (SiO2) with Chalcedony (cryptocrystalline quartz) and likely Iron Oxides/Hydroxides) — Mineral/Sedimentary Rock Feature

Quartz Geode (partially formed/chalcedony with iron staining)

Quartz (SiO2) with Chalcedony (cryptocrystalline quartz) and likely Iron Oxides/Hydroxides

Mineral/Sedimentary Rock Feature

Petrified Wood (Silicified wood, primarily composed of Quartz (SiO2)) — Mineral, often found in sedimentary deposits

Petrified Wood

Silicified wood, primarily composed of Quartz (SiO2)

Mineral, often found in sedimentary deposits

Chrysocolla in Matrix (Chrysocolla (Cu,Al)2H2Si2O5(OH)4·nH2O) — mineral

Chrysocolla in Matrix

Chrysocolla (Cu,Al)2H2Si2O5(OH)4·nH2O

Limonite (Iron Ore/Hydrated Iron Oxide) (Limonite (mixture of FeO(OH)·nH₂O minerals, mainly Goethite, FeO(OH) and Lepidocrocite, FeO(OH))) — Mineral

Limonite (Iron Ore/Hydrated Iron Oxide)

Limonite (mixture of FeO(OH)·nH₂O minerals, mainly Goethite, FeO(OH) and Lepidocrocite, FeO(OH))

Chert (specifically Flint or Jasper variant) (Chert (Siliceous rock composed of microcrystalline Quartz, SiO2)) — sedimentary

Chert (specifically Flint or Jasper variant)

Chert (Siliceous rock composed of microcrystalline Quartz, SiO2)

Hag Stone (Banded Chert or Limestone with Borehole) (Microcrystalline Quartz (Chert) or Calciferous Siltstone (CaCO3/SiO2)) — sedimentary

Hag Stone (Banded Chert or Limestone with Borehole)

Microcrystalline Quartz (Chert) or Calciferous Siltstone (CaCO3/SiO2)

Jasper (Jasper (Silica-rich microcrystalline Quartz, SiO2 with Fe2O3 impurities)) — sedimentary

Jasper

Jasper (Silica-rich microcrystalline Quartz, SiO2 with Fe2O3 impurities)

Yellow Quartzite (Iron-Stained) (Quartzite (primarily SiO2 with iron oxide impurities)) — metamorphic

Yellow Quartzite (Iron-Stained)

Quartzite (primarily SiO2 with iron oxide impurities)

Chert (or Flint) (SiO2 (predominantly microcrystalline quartz)) — Sedimentary

Chert (or Flint)

SiO2 (predominantly microcrystalline quartz)

Micro-crystalline Quartz Pebble (Chert) (Silicon dioxide (SiO2)) — sedimentary

Micro-crystalline Quartz Pebble (Chert)

Silicon dioxide (SiO2)

Banded Jasper (Chert) (Silicon Dioxide (SiO2) - variety of Chalcedony) — Sedimentary Rock

Banded Jasper (Chert)

Silicon Dioxide (SiO2) - variety of Chalcedony

Sedimentary Rock