Rock Identifier

Category

Igneous And Metamorphic Derivative (Weathered)

Browse igneous and metamorphic derivative (weathered) specimens identified by the Rock Identifier community.

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Citrine Quartz (Silicon Dioxide (SiO2) with iron impurities) — mineral

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

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

White Quartz Pebble

Silicon Dioxide (SiO2)

Moonstone (Orthoclase/Albite (KAlSi3O8 / NaAlSi3O8) with Adularescence) — mineral

Moonstone

Orthoclase/Albite (KAlSi3O8 / NaAlSi3O8) with Adularescence

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Quartz (River Pebble) (Quartz (SiO₂ - Silicon Dioxide)) — Mineral

Quartz (River Pebble)

Quartz (SiO₂ - Silicon Dioxide)

Citrine (Citrine (Silicon Dioxide, SiO2)) — mineral

Citrine

Citrine (Silicon Dioxide, SiO2)

Basalt (Basalt (Igneous Volcanic Rock)) — igneous

Basalt

Basalt (Igneous Volcanic Rock)

Zoisite with Ruby (Anyolite) (Zoisite – Ca2Al3(SiO4)3(OH) with inclusions of Ruby (Al2O3:Cr)) — metamorphic

Zoisite with Ruby (Anyolite)

Zoisite – Ca2Al3(SiO4)3(OH) with inclusions of Ruby (Al2O3:Cr)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Coarse-grained Granite (Quartz and Feldspar dominated) (Granitoid (KAlSi3O8 – NaAlSi3O3 – CaAl2Si2O8 – SiO2)) — Igneous

Coarse-grained Granite (Quartz and Feldspar dominated)

Granitoid (KAlSi3O8 – NaAlSi3O3 – CaAl2Si2O8 – SiO2)

Porphyritic Basalt (Porphyritic Basalt (with plagioclase phenocrysts)) — igneous

Porphyritic Basalt

Porphyritic Basalt (with plagioclase phenocrysts)

Quartzite (Metamorphic Quartz (SiO2)) — metamorphic

Quartzite

Metamorphic Quartz (SiO2)

Obsidian (Apache Tear) (Obsidian (Amorphous Volcanic Glass / SiO2 with impurities)) — igneous

Obsidian (Apache Tear)

Obsidian (Amorphous Volcanic Glass / SiO2 with impurities)

Quartzite Pebble (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Metamorphic Quartzite (SiO2)

River Rock (likely Quartzite or Chert) (Quartzite (primarily SiO2)) — metamorphic

River Rock (likely Quartzite or Chert)

Quartzite (primarily SiO2)

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

Quartzite with Chlorite/Epidote

Metamorphosed Quartzite (SiO2)

Quartzite (River Cobble) (SiO2 (Quartz-rich Metamorphic Rock)) — metamorphic

Quartzite (River Cobble)

SiO2 (Quartz-rich Metamorphic Rock)

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

Quartz

Quartz (SiO2 - Silicon Dioxide)

Quartz Pebble (Iron-stained) (Silicon Dioxide (SiO2)) — Mineral / Sedimentary setting

Quartz Pebble (Iron-stained)

Silicon Dioxide (SiO2)

Mineral / Sedimentary setting

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2) with aluminum impurities) — mineral

Smoky Quartz

Silicon Dioxide (SiO2) with aluminum impurities

Green Quartz (Prasiolite variant or Aventurine) (Silicon Dioxide (SiO2)) — mineral

Green Quartz (Prasiolite variant or Aventurine)

Silicon Dioxide (SiO2)

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

Basalt

Basalt (Mafic Extrusive Igneous Rock)

River Pebble (Quartzite/Chert) (Quartzite with inclusions (SiO2)) — metamorphic

River Pebble (Quartzite/Chert)

Quartzite with inclusions (SiO2)

Quartzite (Ferruginous) (Quartzite (major component SiO2 with Fe2O3 impurities)) — metamorphic

Quartzite (Ferruginous)

Quartzite (major component SiO2 with Fe2O3 impurities)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Green Quartzite (Quartzite (primarily SiO2 with trace impurities)) — metamorphic

Green Quartzite

Quartzite (primarily SiO2 with trace impurities)

Quartz (likely Jasper or Chert variety) (Quartz (SiO₂)) — Mineral

Quartz (likely Jasper or Chert variety)

Quartz (SiO₂)

Moonstone (Adularia (Potassium Aluminum Silicate, KAlSi3O8)) — mineral

Moonstone

Adularia (Potassium Aluminum Silicate, KAlSi3O8)

Carnelian (a variety of Chalcedony) (Silicon dioxide (SiO2) with iron oxide impurities) — mineral

Carnelian (a variety of Chalcedony)

Silicon dioxide (SiO2) with iron oxide impurities

Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)

Quartz (various varieties) (SiO₂ (Silicon Dioxide)) — Mineral

Quartz (various varieties)

SiO₂ (Silicon Dioxide)

Ferruginous Quartz (Iron-stained Quartz) (Quartz with Iron Oxide inclusions (SiO2 with Fe2O3)) — mineral

Ferruginous Quartz (Iron-stained Quartz)

Quartz with Iron Oxide inclusions (SiO2 with Fe2O3)

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

Quartz Pebble (Iron-stained)

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

River Pebble (Likely Quartzite or Chalcedony) (Silicon Dioxide (SiO2) - granular metamorphic variety) — metamorphic

River Pebble (Likely Quartzite or Chalcedony)

Silicon Dioxide (SiO2) - granular metamorphic variety

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

Quartzite River Rock

Quartzite (primarily SiO2)

Citrine Quartz (Silicon Dioxide (SiO2) - Ferric Iron impurities) — mineral

Citrine Quartz

Silicon Dioxide (SiO2) - Ferric Iron impurities

Granite (Plutonic felsic igneous rock) — igneous

Granite

Plutonic felsic igneous rock

Quartzite Pebble (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Red Quartzite Cobble (Quartzite (primarily SiO2)) — metamorphic

Red Quartzite Cobble

Quartzite (primarily SiO2)