Chrysocolla and Azurite on Matrix
Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4 (Chrysocolla) and Copper carbonate hydroxide Cu3(CO3)2(OH)2 (Azurite)
mineral
Category
Mineral Precipitate (Anthropogenic Context)
Browse mineral precipitate (anthropogenic context) specimens identified by the Rock Identifier community.
Learn about Mineral Precipitate (Anthropogenic Context) in the encyclopedia
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Quartz Geode
Crystalline Silicon Dioxide (SiO2) in a Geodic structure
mineral
Pyrite in Shale
Iron Disulfide (FeS2) in Sedimentary Shale
mineral
Druzy Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Wishing Stone
Greenschist or Basalt with Quartz/Calcite Vein
metamorphic
Pyrite with Limonite/Goethite Alteration (Pseudomorph)
Iron Sulfide (FeS2) transitioning to Hydrated Iron Oxides (FeO(OH)·nH2O)
mineral
Quartz with Chalcopyrite and Pyrite
Silicon Dioxide (SiO2) with Copper Iron Sulfide (CuFeS2)
mineral
Celestite (Celestine)
Celestine (Strontium Sulfate, SrSO4)
Mineral
Sunstone
Aventurine Feldspar (composition: (Ca,Na)((Al,Si)2Si2O8))
mineral
Quartz (Druzy/Macro-crystalline)
Silicon Dioxide (SiO2)
mineral
Sulfur
Sulfur (S8)
mineral
Botryoidal Hematite (Kidney Ore)
Hematite (Fe2O3)
mineral
Iron-stained Quartz (Gossan/Limonite-coated Quartz)
Silicon Dioxide (SiO2) with Hydrated Iron Oxides (FeO(OH)·nH2O)
mineral
Goldstone (Brown)
Aventurine glass
mineraloid (man-made)
Chert with Jasper/Quartz Inclusions
Silicon Dioxide (SiO2)
sedimentary
Amethyst or Smoky Quartz Geode Slice
Crystalline Silicon Dioxide (SiO2) with iron impurities
mineral
Iron-stained Quartz (with Limonite/Hematite)
Silicon Dioxide (SiO2) with Iron Oxide inclusions (FeO(OH) or Fe2O3)
Mineral
Slag
Ferrous slag (by-product of iron smelting)
Mineraloid / Anthropogenic
Quartz (Drusy/Crystalline variety)
Silicon Dioxide (SiO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
Mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Quartz Druze
Silicon Dioxide (SiO2)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Celestine (or Celestite) Geode
Strontium Sulfate (SrSO4)
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Yellow Ocher (Limonite)
Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O
mineral
Druzy Quartz (on Quartzite or Chert)
Silicon Dioxide (SiO2)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Chert (often called Flint when dark)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone Concretion (Omar or Nut Rock)
Sedimentary Concretion (specifically an 'Omarolluk' or Omar)
sedimentary
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Red Hematite
Iron(III) Oxide (Fe2O3)
mineral
Ferruginous Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
mineral
Specular Hematite (Specularite)
Hematite (Alpha-Fe2O3)
mineral
Copper
Native Copper (Cu)
mineral
Clear Quartz Cluster
Silicon Dioxide (SiO2)
mineral
Quartz Druze (Crystalline Quartz)
Silicon Dioxide (SiO2)
mineral
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
sedimentary
Chalcedony with Druzy Quartz Geode
Silicon Dioxide (SiO2)
mineral
Ferruginous Conglomerate
Ferruginous Conglomerate (Clastic Sedimentary Rock)
sedimentary