Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Category
Browse mineral on sedimentary specimens identified by the Rock Identifier community.
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Gneiss (with Quartzite and Biotite)
Gneiss containing SiO2 (Quartz), K(Mg,Fe)3AlSi3O10(OH)2 (Biotite), and (K,Na,Ca)AlSi3O8 (Feldspar)
Magnetite
Magnetite (Fe3O4)
Chert with Quartz Veining
Silicon Dioxide (SiO2)
Aragonite / Calcite Geode
Calcium Carbonate (CaCO3)
Sandstone
Sandstone (arenite is a more specific geological term for a clean sandstone, while wacke refers to a dirty sandstone with significant matrix)
Limestone (Concretionary or Tufa)
Calcium Carbonate (CaCO3)
Jasper (specifically Red Jasper)
Silicon Dioxide (SiO2) with iron oxide inclusions
Dendritic Jasper
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
Septarian Nodule (Dragon Stone)
Septarian concretion (composition: CaCO3 - Calcite, Aragonite, and Siderite/Limestone)
Jasper
Jasper (Cryptocrystalline variety of Quartz, SiO2)
Ocean Jasper
Orbicular Jasper (Silicon Dioxide with impurities like Hematite and Chlorite, SiO2)
Sandstone
Arenite (often composed of Quartz, SiO2)
Sandstone (with prominent jointing/fractures)
Arenite (composed primarily of SiO2)
Green Kyanite
Kyanite (Al2SiO5)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Gneiss
Gneiss (Metamorphic rock composed primarily of quartz, feldspar, and mica)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz Geode
Silicon Dioxide (SiO2)
Pyrite
Iron Sulfide (FeS2)
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Quartz Geode
Crystalline Quartz (Silicon Dioxide, SiO2)
Pyrite
Iron Sulfide (FeS2)
Galena
Lead Sulfide (PbS)
Optical Calcite (Iceland Spar)
Calcium Carbonate (CaCO3)
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]
Pyrite
Iron Disulfide (FeS2)
Milky Quartz
Silicon Dioxide (SiO2)
Yellow Calcite
Calcium Carbonate (CaCO3)
Galena
Lead(II) sulfide (PbS)
Quartz
Silicon Dioxide (SiO2)
Pyrite
Iron Sulfide (FeS2)
Orange Quartz (or Tumbled Carnelian)
Silicon Dioxide (SiO2) with iron oxide inclusions
Agate (specifically a Yellow/Honey Agate)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Turquoise
Hydrated phosphate of copper and aluminum (CuAl6(PO4)4(OH)8·4H2O)
Quartz (Milky/Common Quartz)
Silicon Dioxide (SiO2)
Hematite with Magnetite
Iron Oxide (Fe2O3)
Pyrite
Iron Sulfide (FeS2)
Pyrite
Iron Disulfide (FeS2)
Blue Kyanite
Kyanite (Al2SiO5)
Quartz (Milky/Gray variety)
Silicon Dioxide (SiO2)
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)