Rock Identifier

Category

Igneous Or Sedimentary (Water Worn)

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

Quartz (likely macrocrystalline variety) (Quartz (SiO₂)) — Mineral

Quartz (likely macrocrystalline variety)

Quartz (SiO₂)

Pumice or Tufa/Travertine (Pumice (if igneous) or Calcareous Tufa (if sedimentary)) — igneous/sedimentary

Pumice or Tufa/Travertine

Pumice (if igneous) or Calcareous Tufa (if sedimentary)

igneous/sedimentary

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (Smoky/Milky variant) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky/Milky variant)

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Carnelian Agate (Carnelian (Silicon Dioxide - SiO2 with Fe impurities)) — mineral

Carnelian Agate

Carnelian (Silicon Dioxide - SiO2 with Fe impurities)

Quartzite with Chlorite/Epidote (Metamorphosed Quartzite (SiO2)) — metamorphic

Quartzite with Chlorite/Epidote

Metamorphosed Quartzite (SiO2)

Quartzite (Quartzite (mostly SiO2)) — metamorphic

Quartzite

Quartzite (mostly SiO2)

Unakite (Epidotized Granite) — metamorphic

Unakite

Epidotized Granite

Quartzite (River Cobble) (Metamorphic Rock (composed predominantly of SiO2)) — metamorphic

Quartzite (River Cobble)

Metamorphic Rock (composed predominantly of SiO2)

Red Jasper (River pebble) (Jasper (Silicon Dioxide, SiO2 plus iron oxide impurities)) — mineral

Red Jasper (River pebble)

Jasper (Silicon Dioxide, SiO2 plus iron oxide impurities)

Greenstone (Greywacke or Nephrite Jade variant) (Metamorphosed mafic igneous or sedimentary rock (e.g., Actinolite-Chlorite Schist)) — metamorphic

Greenstone (Greywacke or Nephrite Jade variant)

Metamorphosed mafic igneous or sedimentary rock (e.g., Actinolite-Chlorite Schist)

Rose Quartz (Rose Quartz (SiO2)) — mineral

Rose Quartz

Rose Quartz (SiO2)

Wishing Stone (Quartz-Veined Pebble) (Hydrothermal Quartz in Metasedimentary Matrix (SiO2/Matrix)) — metamorphic

Wishing Stone (Quartz-Veined Pebble)

Hydrothermal Quartz in Metasedimentary Matrix (SiO2/Matrix)

Yellow Quartzite (River Pebble) (Quartzite (primarily SiO2)) — metamorphic

Yellow Quartzite (River Pebble)

Quartzite (primarily SiO2)

Yellow Quartzite (River Pebble) (Quartzite (mainly SiO2)) — metamorphic

Yellow Quartzite (River Pebble)

Quartzite (mainly SiO2)

River Rock (Quartzite) (Quartzite (SiO2)) — metamorphic

River Rock (Quartzite)

Quartzite (SiO2)

Yellow Jasper (Silicon Dioxide (SiO2) with iron inclusions) — mineral

Yellow Jasper

Silicon Dioxide (SiO2) with iron inclusions

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Green Quartzite (Aventurine variety) (Silicon Dioxide (SiO2) with inclusions of Fuchsite) — metamorphic

Green Quartzite (Aventurine variety)

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Gneissic River Pebble (Gneiss) — metamorphic

Gneissic River Pebble

Gneiss

Ferruginous Quartz (River Pebble) (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — sedimentary (secondary classification for a weathered mineral specimen)

Ferruginous Quartz (River Pebble)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

sedimentary (secondary classification for a weathered mineral specimen)

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

Quartz (River Pebble)

Silicon Dioxide (SiO₂)

Milky Quartz with Mineral Inclusions (Silicon Dioxide (SiO2) with miscellaneous inclusions) — mineral

Milky Quartz with Mineral Inclusions

Silicon Dioxide (SiO2) with miscellaneous inclusions

Milky Quartz (Water-Worn Pebble) (Silicon Dioxide (SiO2)) — mineral

Milky Quartz (Water-Worn Pebble)

Silicon Dioxide (SiO2)

Milky Quartz (Water-Worn Pebble) (Silicon Dioxide (SiO2)) — mineral

Milky Quartz (Water-Worn Pebble)

Silicon Dioxide (SiO2)

Quartzite pebble (Quartzite) — metamorphic

Quartzite pebble

Quartzite

Green Opal (Hydrated Silica (SiO2·nH2O)) — mineraloid

Green Opal

Hydrated Silica (SiO2·nH2O)

Cinnabar in Quartz (Silicon Dioxide (SiO2) with Mercury Sulfide (HgS) inclusions) — Mineral

Cinnabar in Quartz

Silicon Dioxide (SiO2) with Mercury Sulfide (HgS) inclusions

River Pebble (Gneiss or Quartzite variant) (Course-grained Metamorphic Rock (likely SiO2 dominant)) — metamorphic

River Pebble (Gneiss or Quartzite variant)

Course-grained Metamorphic Rock (likely SiO2 dominant)

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

Quartz Pebble

Quartz (Silicon Dioxide - SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)

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

Quartz (Clear / Rock Crystal)

Silicon Dioxide (SiO2)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Greenstone / Greenschist (Greenschist (composed of chlorite, epidote, and actinolite)) — metamorphic

Greenstone / Greenschist

Greenschist (composed of chlorite, epidote, and actinolite)

Banded Gneiss (Gneiss (quartz-feldspar-biotite metamorphic rock)) — metamorphic

Banded Gneiss

Gneiss (quartz-feldspar-biotite metamorphic rock)

Pink Granite (Water-worn Cobble) (Phaneritic Felsic Intrusive Igneous Rock) — igneous

Pink Granite (Water-worn Cobble)

Phaneritic Felsic Intrusive Igneous Rock