Rock Identifier

Category

Igneous Or Sedimentary (Water Worn)

Browse igneous or sedimentary (water worn) specimens identified by the Rock Identifier community.

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

mineral
Yellow Quartz (Citrine type/Tumbled Quartz) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine type/Tumbled Quartz)

Silicon Dioxide (SiO2)

mineral
Amazonite (Potassium aluminum silicate (KAlSi3O8)) — mineral

Amazonite

Potassium aluminum silicate (KAlSi3O8)

mineral
Orca Agate (Chalcedony (SiO2) with various inclusions) — mineral

Orca Agate

Chalcedony (SiO2) with various inclusions

mineral
Pink Orthoclase Feldspar with Dendrites (Orthoclase (KAlSi3O8) with Manganese Oxide dendrites) — mineral

Pink Orthoclase Feldspar with Dendrites

Orthoclase (KAlSi3O8) with Manganese Oxide dendrites

mineral
Granitic Gneiss (Gneiss (Metamorphic rock of granitic composition)) — metamorphic

Granitic Gneiss

Gneiss (Metamorphic rock of granitic composition)

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

Amethyst Quartz (Chevron Amethyst)

Silicon Dioxide (SiO2) with iron impurities

mineral
Vesicular Basalt (Lava Rock) (Basalt (Vesicular Variety)) — igneous

Vesicular Basalt (Lava Rock)

Basalt (Vesicular Variety)

igneous
Scoria (Lava Rock) (Scoriaceous Basalt) — igneous

Scoria (Lava Rock)

Scoriaceous Basalt

igneous
Lava Rock (Scoria) (Scoria (Vesicular Basalt)) — igneous

Lava Rock (Scoria)

Scoria (Vesicular Basalt)

igneous
Glacial Cobble (likely Granitic or Gneissic) (Granite/Gneiss Glacial Erratic) — igneous

Glacial Cobble (likely Granitic or Gneissic)

Granite/Gneiss Glacial Erratic

igneous
Vesicular Basalt (Scoria) (Vesicular Basalt) — igneous

Vesicular Basalt (Scoria)

Vesicular Basalt

igneous
Carnelian Agate (Silicon Dioxide (SiO2)) — mineral

Carnelian Agate

Silicon Dioxide (SiO2)

mineral
Sandstone (Arenite) — sedimentary

Sandstone

Arenite

sedimentary
Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

sedimentary
Sandstone (specifically Lithic or Quartz Arenite) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (specifically Lithic or Quartz Arenite)

Arenite (composed primarily of SiO2)

sedimentary
Limestone (Brecciated/Recrystallized) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (Brecciated/Recrystallized)

Calcium Carbonate (CaCO3)

sedimentary
Ironstone Concretion (Moqui Marble) (Ironstone concretion (Fe2O3 with a sandstone core)) — sedimentary

Ironstone Concretion (Moqui Marble)

Ironstone concretion (Fe2O3 with a sandstone core)

sedimentary
Sandstone (Arenite (SiO2 predominantly)) — sedimentary

Sandstone

Arenite (SiO2 predominantly)

sedimentary
Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

mineral
Amber Calcite (Calcium Carbonate (CaCO3)) — mineral

Amber Calcite

Calcium Carbonate (CaCO3)

mineral
Banded Calcite (often sold as Caribbean Calcite or Mexican Onyx) (Calcium Carbonate (CaCO3)) — mineral

Banded Calcite (often sold as Caribbean Calcite or Mexican Onyx)

Calcium Carbonate (CaCO3)

mineral
Hematite Nodule (Hematite (Fe2O3)) — mineral

Hematite Nodule

Hematite (Fe2O3)

mineral
Orange Calcite (Banded Calcite) (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite (Banded Calcite)

Calcium Carbonate (CaCO3)

mineral
Grey Jasper (Tumbled Quartz variant) (Jasper (Silicon Dioxide, SiO2)) — sedimentary

Grey Jasper (Tumbled Quartz variant)

Jasper (Silicon Dioxide, SiO2)

sedimentary
Halite (Rock Salt) (Halite (Sodium Chloride, NaCl)) — mineral

Halite (Rock Salt)

Halite (Sodium Chloride, NaCl)

mineral
Chalcedony (Common Opal variant or Quartz) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Common Opal variant or Quartz)

Silicon Dioxide (SiO2)

mineral
Quartz Pebble (with potential iron inclusions) (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble (with potential iron inclusions)

Silicon Dioxide (SiO2)

mineral
Pumice (Pumice (Amorphous volcanic glass)) — igneous

Pumice

Pumice (Amorphous volcanic glass)

igneous
Pumice (Pumice (a highly vesicular felsic volcanic rock)) — igneous

Pumice

Pumice (a highly vesicular felsic volcanic rock)

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

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

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

Milky Quartz

Silicon Dioxide (SiO2)

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

Milky Quartz

Silicon Dioxide (SiO2)

mineral
Garnet (specifically Almandine or Pyrope) (Almandine: Fe3Al2(SiO4)3 or Pyrope: Mg3Al2(SiO4)3) — mineral

Garnet (specifically Almandine or Pyrope)

Almandine: Fe3Al2(SiO4)3 or Pyrope: Mg3Al2(SiO4)3

mineral
Sandstone (Ferruginous) (Arenite (composed primarily of SiO2 with Fe2O3 cement)) — sedimentary

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 cement)

sedimentary
Conglomerate (Conglomerate (Clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (Clastic sedimentary rock)

sedimentary
Pumice (Pumice (Alveolar Rhyolite / Dacite / Andesite)) — igneous

Pumice

Pumice (Alveolar Rhyolite / Dacite / Andesite)

igneous
Almandine Garnet (Fe3Al2(SiO4)3) — mineral

Almandine Garnet

Fe3Al2(SiO4)3

mineral
Scoria (Vesicular Basalt) (Scoria (Vesicular Igneous Rock)) — igneous

Scoria (Vesicular Basalt)

Scoria (Vesicular Igneous Rock)

igneous
Pegmatite (Granitic Pegmatite) — igneous

Pegmatite

Granitic Pegmatite

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

Basalt River Pebble

Basalt (Aphanitic Mafic Igneous Rock)

igneous