Rock Identifier

Category

Sedimentary (Secondary Classification: Cryptocrystalline Quartz)

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

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Blue Sapphire (Corundum (Al2O3 with trace amounts of iron and titanium)) — mineral

Blue Sapphire

Corundum (Al2O3 with trace amounts of iron and titanium)

Banded Agate (Onyx type) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Banded Agate (Onyx type)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Chalcedony (specifically Agate or Moonstone-like Quartz) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (specifically Agate or Moonstone-like Quartz)

Silicon Dioxide (SiO2)

Chrysocolla on Matrix (Hydrated copper phyllosilicate mineral (Cu,Al)2H2Si2O5(OH)4·nH2O) — mineral

Chrysocolla on Matrix

Hydrated copper phyllosilicate mineral (Cu,Al)2H2Si2O5(OH)4·nH2O

Copper Ore with Chrysocolla and Azurite (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla) / Cu3(CO3)2(OH)2 (Azurite)) — mineral

Copper Ore with Chrysocolla and Azurite

Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla) / Cu3(CO3)2(OH)2 (Azurite)

Brecciated Chert (Sedimentary Chert (SiO2) with Calc-Silicate mineralization) — sedimentary

Brecciated Chert

Sedimentary Chert (SiO2) with Calc-Silicate mineralization

Agate (Silicon dioxide (SiO2) - variety of chalcedony) — sedimentary

Agate

Silicon dioxide (SiO2) - variety of chalcedony

Jasper (Silicon Dioxide (SiO2) - a variety of Chalcedony (Cryptocrystalline Quartz)) — Mineral

Jasper

Silicon Dioxide (SiO2) - a variety of Chalcedony (Cryptocrystalline Quartz)

Blue Sapphire (Tumbled/Polished) (Corundum (Al2O3)) — mineral

Blue Sapphire (Tumbled/Polished)

Corundum (Al2O3)

Petrified Wood (Silicified Wood (SiO2)) — mineral

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood (Silicified wood (primarily Silicon Dioxide, SiO2)) — metamorphic

Petrified Wood

Silicified wood (primarily Silicon Dioxide, SiO2)

Shale or Argillite (Shale (sedimentary) / Argillite (metamorphic)) — Sedimentary or Metamorphic (low-grade)

Shale or Argillite

Shale (sedimentary) / Argillite (metamorphic)

Sedimentary or Metamorphic (low-grade)

Red Jasper (Silicon dioxide (SiO2)) — mineral

Red Jasper

Silicon dioxide (SiO2)

Onyx (Black Onyx) (Silicon Dioxide (SiO2)) — mineral

Onyx (Black Onyx)

Silicon Dioxide (SiO2)

Basalt with Calcite Veins (Basalt (containing CaCO3 inclusions)) — igneous

Basalt with Calcite Veins

Basalt (containing CaCO3 inclusions)

Gold (Gold (Native Element); Au) — mineral

Gold

Gold (Native Element); Au

Quartz (Sea Glass or River-worn Pebble style) (Silicon Dioxide (SiO2)) — mineral

Quartz (Sea Glass or River-worn Pebble style)

Silicon Dioxide (SiO2)

Ferruginous Siltstone or Mudstone (Ferruginous Siltstone / Goethitic Sandstone) — sedimentary

Ferruginous Siltstone or Mudstone

Ferruginous Siltstone / Goethitic Sandstone

Basalt with Quartz Veins (Basalt (SiO2 range 45-52%)) — igneous

Basalt with Quartz Veins

Basalt (SiO2 range 45-52%)

Banded Jasper (Silicon Dioxide (SiO2)) — Mineral/Sedimentary Rock (as a cryptocrystalline variety of quartz)

Banded Jasper

Silicon Dioxide (SiO2)

Mineral/Sedimentary Rock (as a cryptocrystalline variety of quartz)

Basalt (Basalt (Aphanitic Mafic Igneous Rock)) — igneous

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

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]

Amygdaloidal Basalt (Basalt with Secondary Mineral Infillings) — igneous

Amygdaloidal Basalt

Basalt with Secondary Mineral Infillings

Amygdaloidal Basalt (Basalt with secondary mineral infilling) — igneous

Amygdaloidal Basalt

Basalt with secondary mineral infilling

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Boxwork Quartz / Septarian Jasper (Boxwork (SiO2 with iron oxide inclusions)) — metamorphic

Boxwork Quartz / Septarian Jasper

Boxwork (SiO2 with iron oxide inclusions)

Basalt with vesicles/amygdules (Basalt (containing volcanic glass and plagioclase)) — igneous

Basalt with vesicles/amygdules

Basalt (containing volcanic glass and plagioclase)

Quartzite (Yellow/Iron-Stained) (Quartzite (SiO2 with Iron Oxide impurities)) — metamorphic

Quartzite (Yellow/Iron-Stained)

Quartzite (SiO2 with Iron Oxide impurities)

Amygdaloidal Basalt with Epidote/Chlorite (Basalt (containing (Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH)))) — igneous

Amygdaloidal Basalt with Epidote/Chlorite

Basalt (containing (Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH)))

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

Chrysocolla

Chrysocolla - (Cu,Al)2H2Si2O5(OH)4·nH2O

Agate (Silicon Dioxide (SiO2)) — mineral

Agate

Silicon Dioxide (SiO2)

Turquoise (possible Dyed Howlite or Magnesite imitation) (CuAl6(PO4)4(OH)8·4H2O (Turquoise)) — mineral

Turquoise (possible Dyed Howlite or Magnesite imitation)

CuAl6(PO4)4(OH)8·4H2O (Turquoise)

Jasper Agate (Chalcedony (Silicon Dioxide - SiO2)) — mineral

Jasper Agate

Chalcedony (Silicon Dioxide - SiO2)

Native Copper (Penny specimen) (Native Copper (Cu)) — mineral

Native Copper (Penny specimen)

Native Copper (Cu)

Beach Agate (Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Beach Agate (Chalcedony)

Silicon Dioxide (SiO2)

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)

Limonite (Iron Ore) (Limonite (Iron oxide-hydroxide mixture, FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Limonite (Iron oxide-hydroxide mixture, FeO(OH)·nH2O)

Dyed Blue Agate (Silicon Dioxide (SiO2)) — Mineral

Dyed Blue Agate

Silicon Dioxide (SiO2)

Limonite (Iron Ore) (Limonite (Hydrous ferric oxides), generic formula FeO(OH)·nH2O) — mineral

Limonite (Iron Ore)

Limonite (Hydrous ferric oxides), generic formula FeO(OH)·nH2O

Amygdaloidal Basalt (Amygdaloidal Basalt (extrusive volcanic rock)) — Igneous

Amygdaloidal Basalt

Amygdaloidal Basalt (extrusive volcanic rock)

Banded Iron Formation (Red Jasper and Hematite Chert) (Banded Iron Formation (BIF); Fe2O3 (Hematite) + SiO2 (Quartz/Jasper)) — sedimentary

Banded Iron Formation (Red Jasper and Hematite Chert)

Banded Iron Formation (BIF); Fe2O3 (Hematite) + SiO2 (Quartz/Jasper)