Gossanous Sandstone (likely Terrestrial)
Arenite with Iron-Oxide inclusions
sedimentary
Category
Mineral And Metamorphic Rock
Browse mineral and metamorphic rock specimens identified by the Rock Identifier community.
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Quartzite Pebble
Quartzite
metamorphic
Unakite
Altered Granite (Epidotized Granite)
metamorphic
Quartzite
Quartzite (chiefly SiO2)
metamorphic
Quartzite
Quartzite (predominantly SiO2)
metamorphic
Quartzite
Quartzite (principally SiO2)
metamorphic
Quartzite
Metamorphosed Quartz Sandstone
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (Silicon Dioxide, SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartz with Sericite and Cinnabar
Silicon Dioxide (SiO2) with muscovite/sericite and mercury sulfide (HgS)
mineral
Garnet (likely Pyrope or Almandine)
Garnet Group (complex nesosilicate minerals, e.g., Pyrope Mg3Al2(SiO4)3, Almandine Fe3Al2(SiO4)3, Spessartine Mn3Al2(SiO4)3, Grossular Ca3Al2(SiO4)3, Andradite Ca3Fe2(SiO4)3, Uvarovite Ca3Cr2(SiO4)3). The vivid red color in the image strongly suggests Pyrope or Almandine.
Mineral
Tumbled Agate (Dyed Blue)
Silicon Dioxide (Chalcedony variety)
gemstone
Tumbled blue quartzite or blue chalcedony (uncertain)
Quartz-rich rock; predominantly silicon dioxide (SiO₂)
metamorphic
Vesicular Basalt
Vesicular Basalt
igneous
Serpentine
Antigorite/Lizardite/Chrysotile ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al,Fe)2O5(OH)4)
metamorphic
![Serpentine (Antigorite / Lizardite / Chrysotile [(Mg,Fe)3Si2O5(OH)4]) — metamorphic](https://media.rockidentification.com/4a3ae14f-5aad-4f72-aa4d-9a88cb0c44ad-thumbnail.jpg)
Serpentine
Antigorite / Lizardite / Chrysotile [(Mg,Fe)3Si2O5(OH)4]
metamorphic
Diamond
Carbon (C)
gemstone
Diamond (Martapura/Borneo Diamond)
Carbon (C) - Diamond
mineral
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Not a geological specimen
N/A (man-made object)
N/A
Banded Agate
Silicon Dioxide (SiO2) - Variety Agate
mineral
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Silicon dioxide (SiO2) with Fuchsite inclusions
metamorphic
River Pebble (Likely Chert or Fine-Grained Sandstone/Quartzite)
Siliciclastic clast (likely Chert or Quartzarenite/Quartzite pebble)
Sedimentary
Unakite Epidote Granite
Unakite (Rock composed of Orthoclase, Epidote, and Quartz)
metamorphic
Unakite
Unakite (Altered Granite)
metamorphic
Unakite
Epidotized Granite
metamorphic
Unakite
Epidotized Granite
metamorphic
Basalt (Porphyritic)
Basalt (Mafic Extrusive Igneous Rock)
igneous
Quartz (likely Milky Quartz or Chalcedony)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Iron-rich quartzite or ferruginous metamorphic rock
Ferruginous quartzite, likely hematite/goethite-bearing quartzite; SiO₂ with Fe₂O₃/FeO(OH)
metamorphic