Quartz Geode with Calcite
Silicon Dioxide (SiO2) and Calcium Carbonate (CaCO3)
Mineral/Geode
Category
Mineral Geode
Browse mineral geode specimens identified by the Rock Identifier community.
Chalcedony Geode
Chalcedony (SiO2) within a geode structure
Mineral Geode/Sedimentary or Volcanic related
Quartz Geode
Silicon Dioxide (SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Blue Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Quartz Geode
Silicon Dioxide (SiO2) within a geode
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
sedimentary
Celestine (or Celestite) on Matrix
Celestine (SrSO4)
mineral
Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Quartz (Silicon Dioxide, SiO2)
Mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Druzy Quartz (part of a Geode)
Silicon Dioxide (SiO2)
mineral
Celestine (or Celestite)
Strontium sulfate (SrSO4)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Celestite (Celestine)
Strontium Sulfate (SrSO4)
mineral
Concretion or Geode (unbroken)
Varied (depending on mineral composition and cementing agent). For quartz-lined geodes, the scientific name of the dominant mineral would be Quartz (SiO2). For calcite-lined geodes, Calcite (CaCO3). Concretions are often composed of cryptocrystalline quartz (chert), calcite, or iron oxides.
Sedimentary rock (specifically a concretion or possibly a geode)
Blue Celestite (with Galena)
Strontium sulfate (SrSO4) and Lead sulfide (PbS)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Geode (Unopened)
Siliceous Geode (SiO2)
sedimentary
Celestite (Celectine)
Strontium sulfate (SrSO4)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Celestite Geode
Celestine (Strontium Sulfate, SrSO4)
mineral
Quartz Geode
Silicon Dioxide (SiO2) in Host Rock
sedimentary
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Blue Celestite (Celestine) Cluster
Strontium sulfate (SrSO4)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2) within a geode
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Clear Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2) in Geode form
sedimentary
Quartz Geode
Silicon dioxide (SiO2)
mineral
Geode with Quartz and possibly Jasper/Hematite
Quartz (SiO2) and Chalcedony (cryptocrystalline SiO2), possibly stained by iron oxides
Mineral/Sedimentary Geode
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Geode Nodules / Chalcedony Geode
Silicon Dioxide (SiO2) - Amorphous to Cryptocrystalline Quartz
sedimentary
Geode (unopened nodule)
Silicon Dioxide (SiO2) Nodule
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Geode (Unbroken)
Silicon Dioxide (SiO2) usually as Microcrystalline Quartz or Chalcedony
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
Mineral/Sedimentary
Quartz Geode (likely within Limestone or Dolomite matrix)
Quartz (SiO₂)
Mineral within a Sedimentary Rock