Rock Identifier

Category

Igneous Or Sedimentary (Water Worn)

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

Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

Chalcedony (Quartz Var.) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Quartz Var.)

Silicon Dioxide (SiO2)

Gneiss (Gneiss (High-grade Regional Metamorphism)) — metamorphic

Gneiss

Gneiss (High-grade Regional Metamorphism)

Ferruginous Quartzite (Red Quartzite) (Quartzite (primarily SiO2 with Fe2O3 inclusions)) — metamorphic

Ferruginous Quartzite (Red Quartzite)

Quartzite (primarily SiO2 with Fe2O3 inclusions)

Banded Agate (Agatized Geode Slice) (Silicon Dioxide (SiO₂)) — mineral

Banded Agate (Agatized Geode Slice)

Silicon Dioxide (SiO₂)

Basalt (Porphyritic) (Porphyritic Basalt) — igneous

Basalt (Porphyritic)

Porphyritic Basalt

Granodiorite (Granodiorite (containing Plagioclase, Quartz, and Biotite)) — igneous

Granodiorite

Granodiorite (containing Plagioclase, Quartz, and Biotite)

Milky Quartz (Water-worn pebble/nodule) (Quartz (Silicon Dioxide - SiO2)) — mineral

Milky Quartz (Water-worn pebble/nodule)

Quartz (Silicon Dioxide - SiO2)

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

Quartz (Milky Quartz)

Quartz (SiO2 - Silicon Dioxide)

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

Jasper

Jasper (Silicon Dioxide, SiO2)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Chert / Jasper (Silicon Dioxide (SiO2)) — sedimentary

Chert / Jasper

Silicon Dioxide (SiO2)

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

Nephrite Jade

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

Quartzite (Pink/Red variety) (Quartzite (SiO2 with iron oxide impurities)) — metamorphic

Quartzite (Pink/Red variety)

Quartzite (SiO2 with iron oxide impurities)

Yellow Quartzite (Iron-stained) (Quartzite (primarily SiO2 with Fe2O3 staining)) — metamorphic

Yellow Quartzite (Iron-stained)

Quartzite (primarily SiO2 with Fe2O3 staining)

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

Nephrite Jade

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

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Chert (specifically Flint or Dark Chert) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Flint or Dark Chert)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Botryoidal Chalcedony (Agate/Desert Rose Chalcedony) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Botryoidal Chalcedony (Agate/Desert Rose Chalcedony)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Gneiss (Gneiss (High-grade Metamorphic Rock)) — metamorphic

Gneiss

Gneiss (High-grade Metamorphic Rock)

Fossil Coral (Rugose Coral Fragment) (Rugosa (extinct order of solitary and colonial corals)) — sedimentary

Fossil Coral (Rugose Coral Fragment)

Rugosa (extinct order of solitary and colonial corals)

Quartzite with Quartz Veining (Quartzite (consisting primarily of SiO2)) — metamorphic

Quartzite with Quartz Veining

Quartzite (consisting primarily of SiO2)

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

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartzite Pebbler (Quartzite (primarily SiO2)) — metamorphic

Quartzite Pebbler

Quartzite (primarily SiO2)

Quartzite Pebbles (Quartzite (primarily SiO2)) — metamorphic

Quartzite Pebbles

Quartzite (primarily SiO2)

Rock Crystal Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Rock Crystal Quartz Pebble

Silicon Dioxide (SiO2)

Quartzite Pebble (with iron staining) (Quartzite (SiO2 with ferric oxide impurities)) — metamorphic

Quartzite Pebble (with iron staining)

Quartzite (SiO2 with ferric oxide impurities)

Gneiss (Banded Gneiss) (Gneiss) — metamorphic

Gneiss (Banded Gneiss)

Gneiss

Gneiss (Gneissic Metamorphic Rock) — metamorphic

Gneiss

Gneissic Metamorphic Rock

Quartzite (River Cobble) (Quartzite (dominant mineral: Quatrz, SiO2)) — metamorphic

Quartzite (River Cobble)

Quartzite (dominant mineral: Quatrz, SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartzite Cobble (Quartzite (composed primarily of SiO2)) — metamorphic

Quartzite Cobble

Quartzite (composed primarily of SiO2)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartzite Pebbler (Quartzite (primarily SiO2)) — metamorphic

Quartzite Pebbler

Quartzite (primarily SiO2)

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

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Carnelian (Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Carnelian (Chalcedony)

Silicon Dioxide (SiO2)

Quartz Pebble (often referred to as 'Sea Glass' or 'River Stone' when worn smooth) (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble (often referred to as 'Sea Glass' or 'River Stone' when worn smooth)

Silicon Dioxide (SiO2)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Granite Gneiss River Rock (Gneiss) — Metamorphic

Granite Gneiss River Rock

Gneiss

Gneiss (Gneiss (High-grade Regional Metamorphic Rock)) — metamorphic

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

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

Hematite

Iron(III) oxide (Fe2O3)