Rock Identifier

Category

Sedimentary (Microcrystalline Quartz)

Browse sedimentary (microcrystalline quartz) specimens identified by the Rock Identifier community.

Chert (Nodule) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Nodule)

Silicon Dioxide (SiO2)

sedimentary
Sandstone (likely with Quartz Veining) (Arenite (primarily SiO2)) — sedimentary

Sandstone (likely with Quartz Veining)

Arenite (primarily SiO2)

sedimentary
Quartz (Smoky/Milky variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky/Milky variety)

Silicon Dioxide (SiO2)

mineral
Quartzite River Rock (with Limonite staining) (Quartzite (SiO2)) — metamorphic

Quartzite River Rock (with Limonite staining)

Quartzite (SiO2)

metamorphic
Chert (specifically Jasper) (Silicon dioxide (SiO2) with iron oxide inclusions) — sedimentary

Chert (specifically Jasper)

Silicon dioxide (SiO2) with iron oxide inclusions

sedimentary
Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

metamorphic
Sandstone (Quartzose type) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Quartzose type)

Arenite (primarily SiO2)

sedimentary
Sandstone (Quartzose Sandstone) (Clastic Sedimentary Rock - Arenite) — sedimentary

Sandstone (Quartzose Sandstone)

Clastic Sedimentary Rock - Arenite

sedimentary
Basalt-Amugydule (Amygdaloidal Basalt) (Aphanitic Mafic Igneous Rock with Vesicle Infillings) — igneous

Basalt-Amugydule (Amygdaloidal Basalt)

Aphanitic Mafic Igneous Rock with Vesicle Infillings

igneous
Quartz Crystal with Inclusions (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal with Inclusions

Silicon Dioxide (SiO2)

mineral
Sandstone (likely Quartzose Sandstone) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (likely Quartzose Sandstone)

Arenite (composed primarily of SiO2)

sedimentary
Red Quartz (Druzy) (Silicon Dioxide (SiO2) with Hematite inclusions) — mineral

Red Quartz (Druzy)

Silicon Dioxide (SiO2) with Hematite inclusions

mineral
Grey Chalcedony (Agate) (Silicon Dioxide (SiO2)) — mineral

Grey Chalcedony (Agate)

Silicon Dioxide (SiO2)

mineral
Basalt with Mineral Vein (Cobble) (Basalt (with likely Quartz/Calcite vein)) — Igneous

Basalt with Mineral Vein (Cobble)

Basalt (with likely Quartz/Calcite vein)

Igneous
Petrified Wood (Silicified Wood (SiO2)) — Mineral / Fossil

Petrified Wood

Silicified Wood (SiO2)

Mineral / Fossil
Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

sedimentary
Sandstone (Sandstone (various mineral compositions)) — Sedimentary

Sandstone

Sandstone (various mineral compositions)

Sedimentary
Yellow Chalcedony (Jasper/Chert Pebble) (Silicon Dioxide (SiO2)) — sedimentary

Yellow Chalcedony (Jasper/Chert Pebble)

Silicon Dioxide (SiO2)

sedimentary
Sandstone (specifically Red Sandstone) (Arenite (primarily Quartz, SiO2)) — sedimentary

Sandstone (specifically Red Sandstone)

Arenite (primarily Quartz, SiO2)

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

Milky Quartz

Silicon Dioxide (SiO2)

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

Quartz Geode

Silicon Dioxide (SiO2)

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

Quartz Geode

Silicon Dioxide (SiO2)

mineral
Sandstone (Quartzose) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Quartzose)

Arenite (primarily SiO2)

sedimentary
Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

sedimentary
Sandstone (Ferruginous) (Sandstone (SiO2 with iron oxide inclusions)) — sedimentary

Sandstone (Ferruginous)

Sandstone (SiO2 with iron oxide inclusions)

sedimentary
Sandstone (Arenite) — sedimentary

Sandstone

Arenite

sedimentary
Gneiss (Cobble) (Gneiss) — metamorphic

Gneiss (Cobble)

Gneiss

metamorphic
Quartz (specifically Milky or Clear Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (specifically Milky or Clear Quartz)

Silicon Dioxide (SiO2)

mineral
Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

sedimentary
Chert (often called Flint) (Chert (SiO2)) — sedimentary

Chert (often called Flint)

Chert (SiO2)

sedimentary
Quartz / Quartzite (Silicon Dioxide (SiO2)) — metamorphic

Quartz / Quartzite

Silicon Dioxide (SiO2)

metamorphic
Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

metamorphic
Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

metamorphic
Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

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

Clear Quartz

Silicon Dioxide (SiO2)

mineral
Granular Sandstone (Arenite (variable composition, primarily SiO2)) — sedimentary

Granular Sandstone

Arenite (variable composition, primarily SiO2)

sedimentary
Petrified Wood (Silicified Wood (SiO2 permineralization)) — sedimentary

Petrified Wood

Silicified Wood (SiO2 permineralization)

sedimentary
Ferruginous Sandstone (Ironstone) (Arenite with Limonite/Goethite cement) — sedimentary

Ferruginous Sandstone (Ironstone)

Arenite with Limonite/Goethite cement

sedimentary
Rough Quartz (Alluvial Pebbles) (Silicon Dioxide (SiO2)) — mineral

Rough Quartz (Alluvial Pebbles)

Silicon Dioxide (SiO2)

mineral
Quartz (Clear Quartz/Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

mineral
Botryoidal Chalcedony (Agate) (Silicon Dioxide (SiO2)) — mineral

Botryoidal Chalcedony (Agate)

Silicon Dioxide (SiO2)

mineral
Agate Geode (Silicon Dioxide (SiO2)) — mineral

Agate Geode

Silicon Dioxide (SiO2)

mineral