Rock Identifier

Category

Igneous And Metamorphic Derivative (Weathered)

Browse igneous and metamorphic derivative (weathered) specimens identified by the Rock Identifier community.

Learn about Igneous And Metamorphic Derivative (Weathered) in the encyclopedia

Matte Obsidian

Carbonatite

Frosted Obsidian

Cordierite Hornfels

Cordierite Hornfels

Metabasalt

Eulysite

Migmatite

Anthracite

Metaquartzite

Slate

Marble

Hornfels

Milky quartz vein fragment (Quartz, silicon dioxide (SiO₂)) — mineral

Milky quartz vein fragment

Quartz, silicon dioxide (SiO₂)

Gold Nugget / Placer Gold (Native Gold (Au)) — mineral

Gold Nugget / Placer Gold

Native Gold (Au)

Weathered volcanic rock, likely vesicular basalt or scoria (Basaltic volcanic rock; predominantly plagioclase, pyroxene, and possibly olivine with iron-oxide weathering) — igneous

Weathered volcanic rock, likely vesicular basalt or scoria

Basaltic volcanic rock; predominantly plagioclase, pyroxene, and possibly olivine with iron-oxide weathering

Rounded quartz-rich pebble, possibly granite or gneiss (Indeterminate granitoid; likely quartz–feldspar–biotite aggregate) — igneous

Rounded quartz-rich pebble, possibly granite or gneiss

Indeterminate granitoid; likely quartz–feldspar–biotite aggregate

Quartz Pebble (Silicon dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Weathered granite or granitic gneiss (Granite; primarily quartz, feldspar, and mica (exact identification uncertain from the photo)) — igneous

Weathered granite or granitic gneiss

Granite; primarily quartz, feldspar, and mica (exact identification uncertain from the photo)

Granite or Quartzite fragment (Granite / Quartzite) — igneous/metamorphic

Granite or Quartzite fragment

Granite / Quartzite

igneous/metamorphic

Quartz (likely a form of massive or vein quartz) (Quartz (SiO₂)) — Mineral

Quartz (likely a form of massive or vein quartz)

Quartz (SiO₂)

Mixed Rock Collection (Pebbles and Stones) (Various geological specimens) — igneous, sedimentary, and metamorphic

Mixed Rock Collection (Pebbles and Stones)

Various geological specimens

igneous, sedimentary, and metamorphic

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

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

Quartz (Granular)

Silicon Dioxide (SiO2)

Quartz pebble (Silicon dioxide (SiO2)) — mineral

Quartz pebble

Silicon dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz pebble (Silicon dioxide (SiO2)) — mineral

Quartz pebble

Silicon dioxide (SiO2)

Quartz-rich granitic pegmatite (Pegmatite, composed mainly of quartz (SiO₂), feldspar, and minor mica or iron-oxide minerals) — igneous

Quartz-rich granitic pegmatite

Pegmatite, composed mainly of quartz (SiO₂), feldspar, and minor mica or iron-oxide minerals

Quartz Pebble (Citrine-colored or Stained Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble (Citrine-colored or Stained Quartz)

Silicon Dioxide (SiO2)

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

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Milky quartz (rough quartz crystal) (Quartz, silicon dioxide (SiO₂)) — mineral

Milky quartz (rough quartz crystal)

Quartz, silicon dioxide (SiO₂)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (Iron-Stained Quartz Pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-Stained Quartz Pebble)

Silicon Dioxide (SiO2)

Quartz Sand (Silicon Dioxide (SiO2)) — sedimentary

Quartz Sand

Silicon Dioxide (SiO2)

Quartz-veined Metamorphic Rock (Wishing Stone) (Quartz-veined Metamorphic/Igneous Host Rock with Quartz Veinlets) — metamorphic

Quartz-veined Metamorphic Rock (Wishing Stone)

Quartz-veined Metamorphic/Igneous Host Rock with Quartz Veinlets

Quartz with Host Rock Matrix (Silicon Dioxide (SiO2)) — mineral

Quartz with Host Rock Matrix

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (Raw and Water-worn) (Silicon Dioxide (SiO2)) — mineral

Quartz (Raw and Water-worn)

Silicon Dioxide (SiO2)

Basalt cobble (Basalt; predominantly plagioclase, clinopyroxene, and often olivine or iron-titanium oxides) — igneous

Basalt cobble

Basalt; predominantly plagioclase, clinopyroxene, and often olivine or iron-titanium oxides

Quartz–mica metamorphic rock, likely schist (Quartz–muscovite/biotite schist; predominantly SiO₂ quartz with phyllosilicate micas) — metamorphic

Quartz–mica metamorphic rock, likely schist

Quartz–muscovite/biotite schist; predominantly SiO₂ quartz with phyllosilicate micas

Rounded quartz-rich cobble, likely granite-derived stone (Granite or granitic gneiss, composed mainly of quartz, feldspar, and minor mica) — igneous

Rounded quartz-rich cobble, likely granite-derived stone

Granite or granitic gneiss, composed mainly of quartz, feldspar, and minor mica

Mixed river stones and gravel (Polymictic alluvial clasts; individual pieces may include quartzite, granite, basalt, sandstone, limestone, and slate) — igneous, sedimentary, metamorphic

Mixed river stones and gravel

Polymictic alluvial clasts; individual pieces may include quartzite, granite, basalt, sandstone, limestone, and slate

igneous, sedimentary, metamorphic

Tumbled quartz-rich stone, possibly blue quartz or granite (Quartz (SiO₂), with probable feldspar and dark accessory minerals) — mineral

Tumbled quartz-rich stone, possibly blue quartz or granite

Quartz (SiO₂), with probable feldspar and dark accessory minerals

Quartz Pebble (Sea Glass-like Quartz) (Quartz (Silicon Dioxide - SiO2)) — mineral

Quartz Pebble (Sea Glass-like Quartz)

Quartz (Silicon Dioxide - SiO2)

Likely blue-gray stone, possibly slate or basalt (Indeterminate; candidates include slate (fine-grained metamorphic rock) or basalt (mafic igneous rock)) — metamorphic/igneous

Likely blue-gray stone, possibly slate or basalt

Indeterminate; candidates include slate (fine-grained metamorphic rock) or basalt (mafic igneous rock)

metamorphic/igneous

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Yellow Quartz (Citrine or Iron-stained Quartz) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine or Iron-stained Quartz)

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Fossil shark tooth (Likely fossilized shark tooth, possibly Carcharhinus or Otodus species) — fossil

Fossil shark tooth

Likely fossilized shark tooth, possibly Carcharhinus or Otodus species

Milky quartz fragment (Quartz (silicon dioxide, SiO₂)) — mineral

Milky quartz fragment

Quartz (silicon dioxide, SiO₂)

Tumbled white quartz or quartzite pebble (Quartz (SiO₂), possibly massive quartzite) — mineral

Tumbled white quartz or quartzite pebble

Quartz (SiO₂), possibly massive quartzite

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

Hematite

Iron(III) oxide (Fe2O3)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)