Quartz (Quartzite)
Silicon Dioxide (SiO2)
mineral
Category
Mineral, Jewelry
Browse mineral, jewelry specimens identified by the Rock Identifier community.
Learn about Mineral, Jewelry in the encyclopedia
View all →
Pyrite (on host rock/ore)
Iron Sulfide (FeS2)
mineral
Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Fossil Coral / Crinoid Stem section
Anthozoa / Crinoidea fossil
fossil
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Tiger's Eye
Quartz pseudomorph after crocidolite (SiO2)
gemstone
Purple Dyed Dalmatian Stone
Dyed Peralkaline Trachyte
igneous
Tumbled Yellow Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Tumbled and polished quartz crystal points
Quartz (silicon dioxide, SiO₂), chiefly rock crystal with smoky or included varieties
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Mahogany Obsidian
Obsidian with Hematite inclusions (SiO2 + Fe2O3)
igneous
Dendritic Agate
Chalcedony (Silicon Dioxide) with Manganese or Iron Oxide inclusions
mineral
Rhodonite
Manganese silicate (MnSiO3)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Strawberry Quartz (Quartz with Hematite inclusions)
Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)
mineral
Jasper containing epidote (Unakite-like)
Epidotized Jasper (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Fossilized Shark Tooth
Chondrichthyes (class) fossilized tooth
fossil
Ruby in Zoisite
Anyolite (Ruby in Zoisite)
metamorphic
Carnelian (Red Agate/Chalcedony)
Cryptocrystalline Quartz (SiO2) with Hematite impurities
mineral
Labradorite
(Ca, Na)(Al, Si)4O8
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Orca Agate (Blue Chalcedony)
Silicon Dioxide (SiO2)
mineral
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
mineral
Yellow Aventurine
Quartz containing Muscovite or Mica inclusions (SiO2)
mineral
Strawberry Quartz
Quartz with Hematite or Goethite inclusions (SiO2 + inclusions)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Pyrite (on Quartz/Host Rock)
Iron Sulfide (FeS₂)
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Sunstone Quartz / Aventurine Quartz
Silicon Dioxide (SiO2) with inclusions
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Polished Black Obsidian
Volcanic Glass (70-75% SiO2)
igneous
Garnet (likely Almandine)
Almandine Garnet, Fe3Al2(SiO4)3
mineral
Libyan Desert Glass
Libyan Desert Glass (Impactite / High-silica Lechatelierite)
mineral
Moonstone (Green Moonstone / Garnierite)
Potassium Aluminum Silicate (KAlSi3O8) with inclusions of Garnierite
mineral
Green Aventurine
Quartz with Fuchsite inclusions (SiO2)
mineral
Moss Agate Geode Sphere
Silicon Dioxide (SiO2) - Chalcedony with Chlorite or Manganese inclusions
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with Iron Oxide impurities
mineral
Quartz Pebble (River Agate / Chalcedony)
Silicon Dioxide (SiO2)
mineral
Black Onyx
Chalcedony (Silicon Dioxide - SiO2)
mineral
Green Aventurine
Quartz (Silicon Dioxide, SiO2) with fuchsite inclusions
mineral
Amethyst
SiO2 (Silicon Dioxide with Iron impurities)
mineral
Black Onyx
Cryptocrystalline Quartz (SiO2)
mineral