Quartz Geode Fragment
Silicon Dioxide (SiO2)
sedimentary
Category
Sedimentary Rock (Specifically A Concretion Or Possibly A Geode)
Browse sedimentary rock (specifically a concretion or possibly a geode) specimens identified by the Rock Identifier community.
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Ironstone (Limonitic Concretion)
Limonite (FeO(OH)·nH2O) with Goethite and Hematite inclusions
sedimentary
Quartz Crystal Geode / Druzy Cluster
Silicon Dioxide (SiO2)
mineral
Agate Geode
Silicon Dioxide (SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
sedimentary
Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral
Jasper, possibly Brecciated Jasper or Ocean Jasper due to patterns and color
Silicon Dioxide (SiO2), a variety of Chalcedony
Sedimentary Rock
Chert Geode or Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Chert Concretion (with typical hematite/limonite staining)
Sedimentary Concretion (SiO2 with FeO(OH)⋅nH2O)
sedimentary
Basalt with Quartz/Calcite Veins
Amygdaloidal Basalt (SiO2 or CaCO3 inclusions)
igneous
Agate (specifically a Blue Agate Geode Slice)
Chalcedony (cryptocrystalline variety of Quartz); SiO2
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Chalcedony in Limestone Host Rock
Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)
Mineral within Sedimentary Rock
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Ironstone Concretion (Boxwork)
Siderite-Limonite Concretion (FeO(OH)·nH2O)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Gabbro
Gabbro (mafic intrusive igneous rock)
igneous
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Dyed Quartz Geode
Silicon Dioxide (SiO2) with artificial purple dye
mineral
Quartz Geode
Silicon Dioxide (SiO2) in a Secondary Formation
sedimentary
Agate Geode
Silicon Dioxide (Chalcedony/Quartz), SiO2
sedimentary
Chalcedony Geode / Quartz Druzy
Silicon Dioxide (SiO2)
mineral
Unable to identify - Image contains non-geological items
N/A
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Honey calcite (likely rough cleavage fragment)
Calcite, calcium carbonate (CaCO₃)
mineral
Gneiss (specifically Granite Gneiss)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Blue Chalcedony (likely dyed Agate)
Silicon Dioxide (SiO₂)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Basalt (Drill Core)
Mafic Volcanic Rock (Basalt)
igneous
Quartz Geode (River Cobble)
Silicon Dioxide (SiO2)
mineral
Quartz Druzy / Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Geode (unopened)
Quartz-filled Geode (SiO2)
sedimentary
Geode (Quartz)
Silicon Dioxide (SiO2)
mineral
Generic Rock Fragment
Rock Fragment
sedimentary
Amethyst Geode
Silicon Dioxide (SiO2) with iron impurities
mineral
Limestone with Fossil Imprints
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Red Quartz (Druzy)
Silicon Dioxide (SiO2) with Hematite inclusions
mineral
Fossiliferous Shale or Slate with Plant Fossils
Fossil-bearing argillaceous rock
Sedimentary/Metamorphic
Quartz Geode (Cracked)
Crystalline Silicon Dioxide (SiO2)
mineral
Chalcedony (specifically Agate or Common Opal variety)
Cryptocrystalline Silica (SiO2)
mineral
Quartz (Float/Abraded)
Quartz (SiO₂)
Mineral