Rock Identifier

Category

Non Geological

Browse non geological specimens identified by the Rock Identifier community.

Learn about Non Geological in the encyclopedia

Common Opal

Mudstone

Green Beryl

Matte Obsidian

Sapphire

Hornfels

Argillite

Mint Opal

Plazolite

Bixbite

Weathered quartz-rich metamorphic rock, likely quartzite (Quartzite; predominantly crystalline SiO₂, possibly with mica or feldspar) — metamorphic

Weathered quartz-rich metamorphic rock, likely quartzite

Quartzite; predominantly crystalline SiO₂, possibly with mica or feldspar

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Rounded reddish sandstone pebble (Quartz-rich sandstone, likely ferruginous arkose or litharenite) — sedimentary

Rounded reddish sandstone pebble

Quartz-rich sandstone, likely ferruginous arkose or litharenite

Rounded sandstone pebble (Quartz-rich sandstone (primarily quartz, with feldspar and iron-oxide cement)) — sedimentary

Rounded sandstone pebble

Quartz-rich sandstone (primarily quartz, with feldspar and iron-oxide cement)

Quartzite (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite

Metamorphic Quartzite (SiO2)

Obsidian (Volcanic Glass (mostly SiO2)) — igneous

Obsidian

Volcanic Glass (mostly SiO2)

Polished blue calcite (likely) (Calcite, CaCO₃) — mineral

Polished blue calcite (likely)

Calcite, CaCO₃

Pink sandstone (Quartz-rich siliciclastic sandstone, likely arkose or subarkose) — sedimentary

Pink sandstone

Quartz-rich siliciclastic sandstone, likely arkose or subarkose

Black Obsidian with white veins (Volcanic Glass (70–75% SiO2)) — igneous

Black Obsidian with white veins

Volcanic Glass (70–75% SiO2)

Snowflake Obsidian (Volcanic glass containing Spherulites of Cristobalite (SiO2)) — igneous

Snowflake Obsidian

Volcanic glass containing Spherulites of Cristobalite (SiO2)

Rounded gray river pebble, likely basalt or andesite (Fine-grained mafic to intermediate volcanic rock; commonly basalt (plagioclase + pyroxene, sometimes olivine)) — igneous

Rounded gray river pebble, likely basalt or andesite

Fine-grained mafic to intermediate volcanic rock; commonly basalt (plagioclase + pyroxene, sometimes olivine)

Obsidian (Obsidian (Volcanic Glass, SiO2 + impurities)) — igneous

Obsidian

Obsidian (Volcanic Glass, SiO2 + impurities)

Quartzite (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite

Metamorphic Quartzite (SiO2)

Chert (River Pebble) (Chert (Cryptocrystalline Quartz, SiO₂)) — sedimentary

Chert (River Pebble)

Chert (Cryptocrystalline Quartz, SiO₂)

Unable to identify - Image contains non-geological items — N/A

Unable to identify - Image contains non-geological items

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Barite (Barium Sulfate (BaSO4)) — mineral

Barite

Barium Sulfate (BaSO4)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Granite (Granite (quartz–feldspar intrusive igneous rock)) — igneous

Granite

Granite (quartz–feldspar intrusive igneous rock)

Obsidian (Volcanic Glass (SiO2)) — igneous

Obsidian

Volcanic Glass (SiO2)

Wonderstone (Liesegang Sandstone) (Silicified Sandstone with Liesegang Rings (SiO2 + FeO(OH))) — sedimentary

Wonderstone (Liesegang Sandstone)

Silicified Sandstone with Liesegang Rings (SiO2 + FeO(OH))

Obsidian (Obsidian (volcanic glass), amorphous SiO2 + impurities) — igneous

Obsidian

Obsidian (volcanic glass), amorphous SiO2 + impurities

Quartzite (Metamorphic Quartzite) — metamorphic

Quartzite

Metamorphic Quartzite

Water-worn dark beach pebble (Likely fine-grained basalt or dolerite (diabase)) — igneous

Water-worn dark beach pebble

Likely fine-grained basalt or dolerite (diabase)

Rounded beach pebble (likely quartzite) (Quartzite, composed predominantly of quartz (SiO₂)) — metamorphic

Rounded beach pebble (likely quartzite)

Quartzite, composed predominantly of quartz (SiO₂)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Obsidian (Volcanic glass) — igneous

Obsidian

Volcanic glass

Black Obsidian (Amorphous volcanic glass (SiO2 + impurities)) — igneous

Black Obsidian

Amorphous volcanic glass (SiO2 + impurities)

Quartzite (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite

Metamorphic Quartzite (SiO2)

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

Milky quartz (rough quartz specimen)

Quartz, silicon dioxide (SiO₂)

Obsidian (Volcanic Glass (predominantly SiO2 – Silicon Dioxide, but non-crystalline)) — Igneous

Obsidian

Volcanic Glass (predominantly SiO2 – Silicon Dioxide, but non-crystalline)

Obsidian (Black Obsidian) (Obsidian (Volcanic Glass)) — igneous

Obsidian (Black Obsidian)

Obsidian (Volcanic Glass)

Polished picture jasper (Silicified microcrystalline quartz (chalcedony), commonly called picture jasper) — sedimentary

Polished picture jasper

Silicified microcrystalline quartz (chalcedony), commonly called picture jasper

Siltstone (Siltstone) — sedimentary

Siltstone

Siltstone

Black Obsidian (Volcanic Glass (SiO2)) — igneous

Black Obsidian

Volcanic Glass (SiO2)

Obsidian (Volcanic glass (SiO2 - Silicon Dioxide with impurities)) — Igneous

Obsidian

Volcanic glass (SiO2 - Silicon Dioxide with impurities)

Granite (rounded cobble) (Granite; chiefly quartz, potassium feldspar, plagioclase, and mica) — igneous

Granite (rounded cobble)

Granite; chiefly quartz, potassium feldspar, plagioclase, and mica

Obsidian (Obsidian (Volcanic Glass, SiO2 + impurities)) — igneous

Obsidian

Obsidian (Volcanic Glass, SiO2 + impurities)

Dalmatian jasper (Orbicular microcrystalline quartz rock, commonly rhyolitic or volcanic-feldspar matrix with black arfvedsonite/alkali-amphibole inclusions) — igneous

Dalmatian jasper

Orbicular microcrystalline quartz rock, commonly rhyolitic or volcanic-feldspar matrix with black arfvedsonite/alkali-amphibole inclusions

Sapphire (Corundum (Al2O3)) — gemstone

Sapphire

Corundum (Al2O3)

Obsidian (Obsidian (Extrusive Volcanic Glass)) — igneous

Obsidian

Obsidian (Extrusive Volcanic Glass)

Pale green rough beryl (possibly aquamarine) (Beryl, Be₃Al₂Si₆O₁₈; aquamarine is blue to blue-green beryl) — mineral

Pale green rough beryl (possibly aquamarine)

Beryl, Be₃Al₂Si₆O₁₈; aquamarine is blue to blue-green beryl