Quartz (Crystal/Druzy Quartz)
Quartz (SiO₂)
Mineral
Category
Mineral With Artificial Coating
Browse mineral with artificial coating specimens identified by the Rock Identifier community.
Learn about Mineral With Artificial Coating in the encyclopedia
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Aura Quartz
Silicon Dioxide (SiO2) with metallic vapor coating
mineral
Aura Quartz (Titanium/Bismuth Coated)
Silicon Dioxide (SiO2) with metallic vapor coating
mineral
Smoky Quartz
SiO2 (Silicon Dioxide)
Mineral
White Jade (Nephrite or Jadeite)
Tremolite-Actinolite series (Nephrite) or NaAlSi2O6 (Jadeite)
metamorphic
Pyrite (on host rock)
Iron Sulfide (FeS2)
mineral
Asphalt Concrete
Bituminous Concrete
sedimentary (artificial)
Heat-Treated Citrine (Amethyst)
Silicon Dioxide (SiO2) with iron impurities
mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Hematite/Goethite inclusions
mineral
Fossilized Shark Tooth (Drum Fish Tooth/Pavement Tooth)
Sparidae or Sciaenidae (Crushing plate dental fossil)
fossil
Diorite
Diorite (intermediate intrusive igneous rock)
igneous
Black Onyx
Onyx (Silicon Dioxide, SiO2)
mineral
Jasper with Quartz Druzy
Silicon Dioxide (SiO2)
sedimentary
Red Sandstone
Arenite (primarily Quartz with Iron Oxide coating)
sedimentary
Dyed Agate
Agate (Cryptocrystalline Quartz), SiO2
Mineral
Sandstone (Ferruginous)
Arenite with Iron Oxide (Limonite/Hematite) coating
sedimentary
Quartz Druzy on Matrix (likely Agate or Jasper)
Silicon Dioxide (SiO2) with various mineral inclusions
mineral
Red Chalcedony (likely dyed)
Chalcedony (a variety of Quartz), SiO2
Mineral (Cryptocrystalline Quartz)
River Cobble (likely Metasedimentary or Basalt)
Metamorphosed Siltstone or Altered Fine-grained Igneous Rock
metamorphic
Goldstone
Not a natural mineral or rock. It is an ornamental glass.
Manufactured Glass (Simulant)
Quartz with Iron Oxide Inclusions
Silicon Dioxide (SiO2) with Iron Hydroxide/Oxide (Limonite/Goethite)
mineral
Milky Quartz (Druzy Coating)
Silicon Dioxide (SiO2)
mineral
Red Sandstone
Sandstone (principally Quartz with Iron Oxide coating)
sedimentary
Druzy Quartz on Agate/Chert
Silicon Dioxide (SiO2)
mineral
Kaolinite Claystone
Al2Si2O5(OH)4 (Kaolinite)
sedimentary
Ironstone Concretion (Moqui Marble Type)
Goethite/Hematite-cemented Sandstone Concretion
sedimentary
Smoky Quartz (Chlorite Inclusions)
Silicon Dioxide (SiO2) with trace Aluminum and Natural Irradiation
mineral
Dyed Purple Agate Sliced Tablet
Silicon Dioxide (SiO2), variety Chalcedony
gemstone
Geodal Limestone / Calcite Druze
Calcium Carbonate (CaCO3)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
![Malachite Coating on Host Rock (Malachite [Cu2CO3(OH)2]) — mineral](https://media.rockidentification.com/1a7d7a0a-a0f4-4453-a981-eda24e0e43f8-thumbnail.jpg)
Malachite Coating on Host Rock
Malachite [Cu2CO3(OH)2]
mineral
Sandstone (with Iron Staining)
Arenite (SiO2 predominantly)
sedimentary
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Sandstone with Iron Oxide Coating
Arenite (SiO2 with Fe2O3 impurities)
sedimentary
Chalcanthite (Likely Synthetic/Lab-Grown)
Hydrated copper(II) sulfate (CuSO4·5H2O)
mineral
Limonite (Ironstone)
Limonite (FeO(OH)·nH2O)
mineral
Smoky Quartz
SiO2 (Silicon Dioxide)
Mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Crackle Quartz (Dyed)
SiO2 (Silicon Dioxide) - Treated
mineral
Quartz Geode with Iron Oxide
Silicon Dioxide (SiO2) with Hematite/Goethite coatings
mineral
Red Jasper
Quartz (SiO2) with iron oxide inclusions
sedimentary
Limonite
Hydrous Iron Oxide (often Goethite FeO(OH), Lepidocrocite γ-FeO(OH), and other amorphous iron oxyhydroxides)
Mineral