Rock Identifier

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Claystone

Shale

Rock Salt

Rock Gypsum

Coral Rock

Asphalt Rock

Calc-Silicate Rock

Calc-Silicate Rock

Albite

Talc-carbonate Rock

Talc-carbonate Rock

Potassium Feldspar

Potassium Feldspar

Halite

Dolomite

Quartz on Matrix (Silicon Dioxide (SiO2)) — mineral

Quartz on Matrix

Silicon Dioxide (SiO2)

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Banded Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (Metamorphic Rock)

River cobble (Greywacke/Sandstone) (Sandstone / Greywacke) — sedimentary

River cobble (Greywacke/Sandstone)

Sandstone / Greywacke

Granite Pebble (Intrusive igneous rock (Quartz, Feldspar, Mica)) — igneous

Granite Pebble

Intrusive igneous rock (Quartz, Feldspar, Mica)

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Bivalve Seashell Fossil (Class Bivalvia) — fossil

Bivalve Seashell Fossil

Class Bivalvia

Biotite gneiss (probable) (Foliated quartz–feldspar–mica gneiss; commonly containing biotite mica, quartz, and plagioclase/alkali feldspar) — metamorphic

Biotite gneiss (probable)

Foliated quartz–feldspar–mica gneiss; commonly containing biotite mica, quartz, and plagioclase/alkali feldspar

Red Sandstone (Sedimentary Arenite / Quartzose Sandstone) — sedimentary

Red Sandstone

Sedimentary Arenite / Quartzose Sandstone

Shale (Shale (Fine-grained clastic sedimentary rock)) — sedimentary

Shale

Shale (Fine-grained clastic sedimentary rock)

Sandstone (Arenite (Sedimentary Rock)) — sedimentary

Sandstone

Arenite (Sedimentary Rock)

Granite (Intrusive Igneous Rock (composed of quartz, alkali feldspar, and plagioclase)) — igneous

Granite

Intrusive Igneous Rock (composed of quartz, alkali feldspar, and plagioclase)

Sandstone (River Cobble) (Sandstone (principally composed of Quartz, SiO2)) — sedimentary

Sandstone (River Cobble)

Sandstone (principally composed of Quartz, SiO2)

Likely garnet crystal fragment (Garnet-group mineral, possibly almandine (Fe₃Al₂(SiO₄)₃)) — mineral

Likely garnet crystal fragment

Garnet-group mineral, possibly almandine (Fe₃Al₂(SiO₄)₃)

Quartz Druzy (Crystalline Silicon Dioxide (SiO2)) — mineral

Quartz Druzy

Crystalline Silicon Dioxide (SiO2)

Weathered granite or granitic gneiss (Granite; primarily quartz, feldspar, and mica) — igneous

Weathered granite or granitic gneiss

Granite; primarily quartz, feldspar, and mica

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

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Sandstone (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone

Clastic sedimentary rock (primarily SiO2)

Limonite Stained Basalt (Hydrated Iron Oxide on Mafic Volcanic Rock (FeO(OH)·nH2O)) — igneous

Limonite Stained Basalt

Hydrated Iron Oxide on Mafic Volcanic Rock (FeO(OH)·nH2O)

Banded Slate (Slate (Metamorphosed Siltstone/Mudstone)) — metamorphic

Banded Slate

Slate (Metamorphosed Siltstone/Mudstone)

Petrified Wood (Silicified wood (primarily quartz, SiO2)) — fossil

Petrified Wood

Silicified wood (primarily quartz, SiO2)

Quartz pebble with calcite (Silicon dioxide (SiO2) with Calcium carbonate (CaCO3)) — sedimentary

Quartz pebble with calcite

Silicon dioxide (SiO2) with Calcium carbonate (CaCO3)

Copper Ore (Malachite and Azurite on Host Rock) (Cuprite, Malachite, and Azurite dissemination in gangue) — mineral

Copper Ore (Malachite and Azurite on Host Rock)

Cuprite, Malachite, and Azurite dissemination in gangue

Sandstone (Arenite (SiO2 principal)) — sedimentary

Sandstone

Arenite (SiO2 principal)

Brecciated quartz vein rock (Quartz (SiO₂), with iron-oxide staining and likely feldspar/carbonate gangue) — mineral

Brecciated quartz vein rock

Quartz (SiO₂), with iron-oxide staining and likely feldspar/carbonate gangue

Sandstone Cobble (Clastic Sedimentary (Sandstone)) — sedimentary

Sandstone Cobble

Clastic Sedimentary (Sandstone)

Weathered granite or granitic gneiss block (Granite, chiefly quartz, feldspar, and mica; possibly gneiss if the visible banding is structural) — igneous

Weathered granite or granitic gneiss block

Granite, chiefly quartz, feldspar, and mica; possibly gneiss if the visible banding is structural

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Sandstone (Sedimentary Rock (Quartz Sandstone)) — sedimentary

Sandstone

Sedimentary Rock (Quartz Sandstone)

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Granite-like igneous rock (Likely medium-grained granite or granodiorite; quartz–feldspar–mica aggregate) — igneous

Granite-like igneous rock

Likely medium-grained granite or granodiorite; quartz–feldspar–mica aggregate

Weathered granite or granitic gneiss fragment (Granite; chiefly quartz (SiO₂), feldspar, and mica, with iron-oxide weathering) — igneous

Weathered granite or granitic gneiss fragment

Granite; chiefly quartz (SiO₂), feldspar, and mica, with iron-oxide weathering

Shale (Clastic Sedimentary Rock) — sedimentary

Shale

Clastic Sedimentary Rock

Serpentinite (Serpentinite (complex silicate minerals including lizardite, chrysotile, and antigorite: (Mg,Fe)3Si2O5(OH)4)) — metamorphic

Serpentinite

Serpentinite (complex silicate minerals including lizardite, chrysotile, and antigorite: (Mg,Fe)3Si2O5(OH)4)

Weathered granite or granitic rock fragment (Granite; chiefly quartz, feldspar, and mica/amphibole) — igneous

Weathered granite or granitic rock fragment

Granite; chiefly quartz, feldspar, and mica/amphibole

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Light-colored granite or granitic gneiss (Granite; typically quartz + feldspar + mica (variable composition)) — igneous

Light-colored granite or granitic gneiss

Granite; typically quartz + feldspar + mica (variable composition)

Copper Ore (Malachite and Limonite bearing rock) (Copper-bearing rock with secondary copper minerals) — mineral

Copper Ore (Malachite and Limonite bearing rock)

Copper-bearing rock with secondary copper minerals

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Quartz Druzy (Geode Fragment) (Silicon Dioxide (SiO2)) — mineral

Quartz Druzy (Geode Fragment)

Silicon Dioxide (SiO2)

Tumbled amber-colored agate or chalcedony (Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/agate) — mineral

Tumbled amber-colored agate or chalcedony

Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/agate

Quartz Crystal Cluster on Matrix (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal Cluster on Matrix

Silicon Dioxide (SiO2)