Gneiss
Gneiss
metamorphic
Category
Igneous Or Sedimentary
Browse igneous or sedimentary specimens identified by the Rock Identifier community.
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Tumbled Agate
Silicon Dioxide (Chalcedony variety), SiO2
gemstone
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Carnelian Agate
Chalcedony (SiO2)
mineral
Agate Nodule / Weathered Chert
SiO2 (Silicon Dioxide - Microcrystalline Quartz)
Sedimentary / Mineral
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Quartz Crystal (Geode Fragment)
Silicon Dioxide (SiO2)
mineral
Quartz pebble (Agate / Chalcedony)
Silicon Dioxide (SiO2)
mineral
Agate
Silicon dioxide (Chalcedony), SiO2
sedimentary
Agate
Silicon Dioxide (Chalcedony), SiO2
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Mixed Rock Collection (Pebbles and Stones)
Various geological specimens
igneous, sedimentary, and metamorphic
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Chalcedony (Agate/Carnelian)
Silicon Dioxide (SiO2)
mineral
Chalcedony (Agate)
Cryptocrystalline Quartz (SiO2)
sedimentary
Gneiss
Metamorphic Gneiss
metamorphic
Quartz Geode
Silicon Dioxide (SiO2) - Crystalline Quartz
mineral
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (Metamorphic high-grade)
metamorphic
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Quartz Druzy (on Geode Fragments)
Silicon Dioxide (SiO2)
mineral
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Banded Agate
Cryptocrystalline Quartz (SiO2)
sedimentary
Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Botryoidal Chalcedony
Silicon Dioxide (SiO2)
mineral
Gneiss
Metamorphic Foliated Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Gneiss
Gneiss
metamorphic
Chalcedony (Agate/Carnelian variety)
Cryptocrystalline Quartz (SiO2)
mineral
Ruby in Zoisite
Zoisite with Corundum (Ca2Al3(SiO4)(Si2O7)O(OH) + Al2O3)
metamorphic
Foliated Metamorphic Rock (likely Gneiss or Schist)
Gneissic Metamorphic Rock
metamorphic
Agate
Chalcedony (SiO2)
mineral
Tumbled Agate
Silicon Dioxide (Quartz variety: Chalcedony)
gemstone
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Blue Agate Slice
Chalcedony (SiO2)
gemstone
Agate
Silicon dioxide (Chalcedony), SiO2
sedimentary