Quartz pebble (Agate / Chalcedony)
Silicon Dioxide (SiO2)
mineral
Category
Igneous Or Sedimentary
Browse igneous or sedimentary specimens identified by the Rock Identifier community.
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Agate
Silicon dioxide (Chalcedony), SiO2
sedimentary
Quartz Crystal (Geode Fragment)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Chalcedony (Agate)
Cryptocrystalline Quartz (SiO2)
sedimentary
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Chalcedony (Agate/Carnelian)
Silicon Dioxide (SiO2)
mineral
Gneiss
Metamorphic Gneiss
metamorphic
Quartz Geode
Silicon Dioxide (SiO2) - Crystalline Quartz
mineral
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (Metamorphic high-grade)
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Mixed Rock Collection (Pebbles and Stones)
Various geological specimens
igneous, sedimentary, and metamorphic
Agate
Silicon Dioxide (Chalcedony), SiO2
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
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
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
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
Ruby in Zoisite
Anyolite (composite of Corundum Al2O3 and Zoisite Ca2Al3(SiO4)(Si2O7)O(OH))
metamorphic
Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Gneiss
Gneiss
metamorphic
Carnelian Agate
Chalcedony (SiO2 with Iron Oxides)
sedimentary
Jasper Agate (Chalcedony)
Silicon Dioxide (SiO2)
sedimentary
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
Agate
Chalcedony (SiO2)
mineral
Fluorite
Fluoride (Calcium Fluoride - CaF2)
mineral