Rock Identifier

Category

Igneous Or Sedimentary (Water Worn)

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

Quartz (specifically Milky/Gray Quartz vein) (Silicon Dioxide (SiO2)) — mineral

Quartz (specifically Milky/Gray Quartz vein)

Silicon Dioxide (SiO2)

Quartzite (River Pebble) (Quartzite (composed primarily of Silica, SiO2)) — metamorphic

Quartzite (River Pebble)

Quartzite (composed primarily of Silica, SiO2)

Amber Agate / Carnelian (Chalcedony (Silicon Dioxide, SiO2)) — mineral

Amber Agate / Carnelian

Chalcedony (Silicon Dioxide, SiO2)

Chert (and Jasper pebble) (Microcrystalline Silica (SiO2)) — sedimentary

Chert (and Jasper pebble)

Microcrystalline Silica (SiO2)

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

Hematite

Iron(III) oxide (Fe2O3)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Banded Gneiss (Gneiss (High-grade regional metamorphic rock)) — metamorphic

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Quartzite (River Pebble) (Quartzite (composed primarily of Silica, SiO2)) — metamorphic

Quartzite (River Pebble)

Quartzite (composed primarily of Silica, SiO2)

Chert (often called Flint or Jasper) (Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)) — sedimentary

Chert (often called Flint or Jasper)

Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)

Chert (variously known as Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (variously known as Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Nephrite Jade (Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)) — metamorphic

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Jade (Nephrite) (Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)) — metamorphic

Jade (Nephrite)

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Basalt with Plagioclase Phenocrysts (Porphyritic Basalt) (Porphyritic Basalt (Mafic volcanic rock)) — igneous

Basalt with Plagioclase Phenocrysts (Porphyritic Basalt)

Porphyritic Basalt (Mafic volcanic rock)

Basalt (Weathered) (Extrusive Igneous Rock (Mafic composition)) — igneous

Basalt (Weathered)

Extrusive Igneous Rock (Mafic composition)

Chert (specifically Flint or Jasper variant) (Microcrystalline silica (SiO2)) — sedimentary

Chert (specifically Flint or Jasper variant)

Microcrystalline silica (SiO2)

Chert (Jasper/Flint variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

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

Hematite

Iron(III) oxide (Fe2O3)

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

Clear Quartz Crystal Cluster

Silicon Dioxide (SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Sandstone (Red) (Arenite (primarily Quartz, SiO2, with Iron Oxide cement)) — sedimentary

Sandstone (Red)

Arenite (primarily Quartz, SiO2, with Iron Oxide cement)

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

Yellow Chalcedony (Agate)

Silicon Dioxide (SiO2)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Chert (with possible fossils) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (with possible fossils)

Microcrystalline quartz (SiO2)

Gneiss (Pebble) (Gneiss) — metamorphic

Gneiss (Pebble)

Gneiss

Chert (Yellow or Brown Jasper) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Yellow or Brown Jasper)

Microcrystalline Quartz (SiO2)

Chert (White Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (White Flint)

Microcrystalline Quartz (SiO2)

Granite (Granite (Felsic Plutonic Rock)) — Igneous

Granite

Granite (Felsic Plutonic Rock)

Nephrite Jade (Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)) — metamorphic

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Nephrite Jade (Tremolite-Actinolite solid solution Ca2(Mg,Fe)5Si8O22(OH)2) — metamorphic

Nephrite Jade

Tremolite-Actinolite solid solution Ca2(Mg,Fe)5Si8O22(OH)2

Quartzite Pebble (Quartzite (primarily SiO2)) — metamorphic

Quartzite Pebble

Quartzite (primarily SiO2)

Wishing Stone with Quartz Veins (Quartzite or Quartz-veined Metamorphic Rock (composed mainly of SiO2)) — metamorphic

Wishing Stone with Quartz Veins

Quartzite or Quartz-veined Metamorphic Rock (composed mainly of SiO2)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Red Quartzite Slipper Stone (Quartzite (SiO2)) — metamorphic

Red Quartzite Slipper Stone

Quartzite (SiO2)

Chert (specifically Flint) (Chert (SiO2)) — sedimentary

Chert (specifically Flint)

Chert (SiO2)

River Stone (likely Siltstone or fine-grained Basalt) (Clastic Sedimentary (Siltstone) or Mafic Igneous (Basalt)) — sedimentary or igneous

River Stone (likely Siltstone or fine-grained Basalt)

Clastic Sedimentary (Siltstone) or Mafic Igneous (Basalt)

sedimentary or igneous

Basalt with Quartz Infill (Basalt (Mafic Extrusive Volcanic Rock)) — igneous

Basalt with Quartz Infill

Basalt (Mafic Extrusive Volcanic Rock)

Yellow Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Jasper (Jasper (Silicon Dioxide, SiO2)) — sedimentary

Jasper

Jasper (Silicon Dioxide, SiO2)

Chert (Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline Quartz (SiO2)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Chert (Jasper/Flint variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)