Quartz Geode
Silicon Dioxide (SiO2)
sedimentary
Category
Mineral, Often Found In Sedimentary Deposits
Browse mineral, often found in sedimentary deposits specimens identified by the Rock Identifier community.
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Red Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
mineral
Pyrite Nodule
Iron Sulfide (FeS2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold) in Matrix
Iron Disulfide (FeS2)
mineral
Green Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
sedimentary
Chalcedony (Agate / Quartz Pebble)
Silicon Dioxide (SiO2)
mineral
Pink Opal
Hydrated amorphous silica (SiO2·nH2O)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Fossil Sea Urchin (Echinoid)
Echinoidea fossil (often replaced by silica or calcite)
fossil
Sandstone (Quartzite-rich)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Blue Howlite (Dyed)
Dyed Howlite (Calcium Borosilicate Hydroxide, Ca2B5SiO9(OH)5)
mineral
Quartz Crystal Cluster with Iron Stain
Silicon Dioxide (SiO2)
mineral
Orange Quartz (or Carnelian Chalcedony)
Silicon Dioxide (SiO2)
mineral
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Fossilized Crinoid Stem Cross-Section
Crinoidea
fossil
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Iron-stained Quartz (with Limonite/Hematite)
Silicon Dioxide (SiO2) with Iron Oxide inclusions (FeO(OH) or Fe2O3)
Mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Glauconite
(K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
mineral
Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
sedimentary
Jasper
Cryptocrystalline quartz (SiO2)
Sedimentary/Mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Limonite with Iron Inclusions
Limonite (Hydrated Iron Oxide, FeO(OH)·nH2O)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Chert nodules
Microcrystalline Quartz (SiO2)
sedimentary
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Geode
Quartz / Chalcedony nodule
sedimentary
Likely sulfur-bearing rock (possibly native sulfur)
Native sulfur (S), though the image alone cannot confirm the specimen’s identity
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Shark Tooth Fossil
Carcharocles megalodon or similar extinct shark tooth
fossil
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Halite
Sodium chloride (NaCl)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Purple Chalcedony
Silicon Dioxide (SiO2)
mineral
Magnetite
Magnetite (Fe3O4)
mineral
Limonite (Ironstone)
Limonite (mixture of hydrated iron oxides, primarily Goethite α-FeO(OH))
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Sphalerite
Zinc Sulfide (Zn,Fe)S
mineral