Rock Identifier

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Browse none specimens identified by the Rock Identifier community.

Tiger's Eye (Pseudomorph of quartz after crocidolite (SiO2)) — metamorphic

Tiger's Eye

Pseudomorph of quartz after crocidolite (SiO2)

Chert (and/or Chalcedony) (Microcrystalline Silica (SiO2)) — sedimentary

Chert (and/or Chalcedony)

Microcrystalline Silica (SiO2)

Chert (and Quartz Gravel) (Chert (Cryptocrystalline Quartz, SiO2)) — sedimentary

Chert (and Quartz Gravel)

Chert (Cryptocrystalline Quartz, SiO2)

Amethyst (Quartz Cluster) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst (Quartz Cluster)

Silicon Dioxide (SiO2) with iron impurities

White Quartz (Milky Quartz Mushroom) (Silicon Dioxide (SiO2)) — mineral

White Quartz (Milky Quartz Mushroom)

Silicon Dioxide (SiO2)

Chert (Arrowhead variety) (Chert (SiO2)) — sedimentary

Chert (Arrowhead variety)

Chert (SiO2)

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

Jasper

Jasper (Silicon Dioxide, SiO2)

Fossiliferous Limestone (Coquina) (Biogenic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Fossiliferous Limestone (Coquina)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Amethyst (Silicon Dioxide (SiO2) with Fe3+ impurities) — mineral

Amethyst

Silicon Dioxide (SiO2) with Fe3+ impurities

Red Jasper (Silicon Dioxide (SiO2) with Hematite inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Yellow Jasper (Silicon Dioxide (SiO2)) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2)

Chert (with small quartz inclusion) (Microcrystalline Silica (SiO2)) — sedimentary

Chert (with small quartz inclusion)

Microcrystalline Silica (SiO2)

Jasper (Cream/Yellow variety) (Silicon dioxide (SiO2)) — sedimentary

Jasper (Cream/Yellow variety)

Silicon dioxide (SiO2)

Milky Quartz (Quartz (Silica / Silicon Dioxide, SiO2)) — mineral

Milky Quartz

Quartz (Silica / Silicon Dioxide, SiO2)

Rose Quartz (Silicon Dioxide (SiO2)) — mineral

Rose Quartz

Silicon Dioxide (SiO2)

Rose Quartz (Silicon dioxide (SiO2)) — mineral

Rose Quartz

Silicon dioxide (SiO2)

Ferruginous Quartzite (Iron-stained Quartzite) (Quartzite with Iron oxides (FeO(OH) / Fe2O3)) — metamorphic

Ferruginous Quartzite (Iron-stained Quartzite)

Quartzite with Iron oxides (FeO(OH) / Fe2O3)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

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

Red Jasper

Silicon Dioxide (SiO2) with Iron inclusions

Chert Conglomerate (or Breccia) (Sedimentary Clastic Rock (variety: Ferruginous Chert Breccia)) — sedimentary

Chert Conglomerate (or Breccia)

Sedimentary Clastic Rock (variety: Ferruginous Chert Breccia)

Milky Quartz with Iron Inclusions (Silicon Dioxide (SiO2)) — mineral

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Rough Star Sapphire (Corundum) (Al2O3 (Aluminum Oxide)) — mineral

Rough Star Sapphire (Corundum)

Al2O3 (Aluminum Oxide)

Smoky Quartz with Calcite/Quartz Veining (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz with Calcite/Quartz Veining

Silicon Dioxide (SiO2)

Chert (Iron-stained) (Chert / Microcrystalline Silicon Dioxide (SiO2)) — sedimentary

Chert (Iron-stained)

Chert / Microcrystalline Silicon Dioxide (SiO2)

Chert (Brown variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Brown variety)

Silicon Dioxide (SiO2)

Quartz Geode (partially formed) (Silicon Dioxide (SiO2)) — mineral

Quartz Geode (partially formed)

Silicon Dioxide (SiO2)

Sandstone (likely Arkosic or Lithic Sandstone) (Clastic Sedimentary Rock (SiO2 with assorted minerals)) — sedimentary

Sandstone (likely Arkosic or Lithic Sandstone)

Clastic Sedimentary Rock (SiO2 with assorted minerals)

Bumble Bee Jasper (Calcite-bearing Volcanic Tuff (not a true Jasper)) — sedimentary

Bumble Bee Jasper

Calcite-bearing Volcanic Tuff (not a true Jasper)

Pearl (Calcium Carbonate (Aragonite) with Conchiolin; formula: CaCO3) — mineral

Pearl

Calcium Carbonate (Aragonite) with Conchiolin; formula: CaCO3

Banded Chert (River Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert (River Pebble)

Microcrystalline Quartz (SiO2)

Chert (often called Flint or Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Chert (often called Flint or Jasper)

Silicon Dioxide (SiO2)

Magnetite (Lodestone variety) (Magnetite (Fe3O4)) — mineral

Magnetite (Lodestone variety)

Magnetite (Fe3O4)

Rose Quartz (Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese) — mineral

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Limonite (Iron Stone Concretion) (Limonite (Hydrous Iron Oxide) - FeO(OH)·nH2O) — mineral

Limonite (Iron Stone Concretion)

Limonite (Hydrous Iron Oxide) - FeO(OH)·nH2O

Rose Quartz (SiO2 (Silicon Dioxide)) — mineral

Rose Quartz

SiO2 (Silicon Dioxide)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Amethyst (Silicon Dioxide (SiO2) with Fe3+ impurities) — mineral

Amethyst

Silicon Dioxide (SiO2) with Fe3+ impurities

Sandstone (River Pebble) (Arenite (primarily SiO2)) — sedimentary

Sandstone (River Pebble)

Arenite (primarily SiO2)

Fossiliferous Limestone with Rugose Coral (Calcite (CaCO3) matrix containing Rugosa (order of extinct solitary and colonial corals)) — sedimentary

Fossiliferous Limestone with Rugose Coral

Calcite (CaCO3) matrix containing Rugosa (order of extinct solitary and colonial corals)

Ferruginous Quartz (Iron-stained Quartz) (Silicon Dioxide (SiO2) with iron oxide inclusions (Limonite/Hematite)) — mineral

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2) with iron oxide inclusions (Limonite/Hematite)