Geode (Unopened)
Chalcedony Geode (Hydrated Silicon Dioxide, SiO2)
Category
Browse sedimentary or metamorphic derived specimens identified by the Rock Identifier community.
Geode (Unopened)
Chalcedony Geode (Hydrated Silicon Dioxide, SiO2)
Quartz Cluster (Likely Ferruginous)
Silicon Dioxide (SiO2)
Quartz Geode
Silicon Dioxide (SiO2) in Host Rock
Jasper (Cream/Yellow variety)
Jasper (Microcrystalline Quartz, SiO2)
Quartz Geode Segment
Crystalline Silicon Dioxide (SiO2)
Gneiss
High-grade Metamorphic Gneiss
Green Aventurine
Silicon Dioxide with Fuchsite (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
Quartzite (Quartz sand or Chert)
Quartzite (SiO2)
Garnet Schist or Garnet-bearing Quartzite
Metamorphic rock containing Almandine Garnet (Fe3Al2(SiO4)3) and Quartz (SiO2)
Garnet (Almandine)
Almandine, Fe3Al2(SiO4)3
Gneiss
Gneiss (Metamorphic rock composed primarily of quartz, feldspar, and mica)
Gneiss
Gneiss
Feldspathic Gneiss (Granite Gneiss)
Gneiss (High-grade Regional Metamorphic Rock)
Biotite Schist with Garnet
Garnet-Biotite Schist
Garnet Schist
Garnet-bearing Mica Schist (variety of compositions, often Al2SiO5 with X3Y2(SiO4)3)
Faceted Clear Quartz
Crystalline Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Magnetite
Magnetite (Fe3O4)
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
Orange Calcite
Calcium Carbonate (CaCO3)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Mixed Tumbled Gemstones and River Rocks
Mixed Decorative Stones (predominantly Silicon Dioxide - SiO2 variants)
Emerald
Beryl (Be₃Al₂(SiO₃)‑₆) with Chromium/Vanadium impurities
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
Galena
Lead Sulfide (PbS)
Milky Quartz
Silicon Dioxide (SiO2)
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
Clear Quartz (Rock Crystal)
Quartz (Silicon Dioxide, SiO2)
Copper and Quartz beads
Native Copper (Cu) and Crystalline Quartz (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Magnetite
Iron(II,III) oxide (Fe3O4)
Quartz (specifically Clear Quartz or Rock Crystal)
Silicon Dioxide (SiO2)
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
Quartz
Silicon Dioxide (SiO2)