Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Category
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Browse this image does not display a rock, mineral, or geological specimen. it shows a human hand wearing a ring. specimens identified by the Rock Identifier community.
Serpentinite (often called Jade or Nephrite substitute)
Serpentinite (composed primarily of Antigorite, Lizardite, or Chrysotile)
metamorphic
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Carnelian
Carnelian (a variety of Chalcedony, SiO2)
Mineral
Labradorite
Labradorite (Plagioclase Feldspar Series: (Ca,Na)(Al,Si)4O8)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Zoisite with Ruby (Anyolite)
Zoisite – Ca2Al3(SiO4)3(OH) with inclusions of Ruby (Al2O3:Cr)
metamorphic
Yellow Chert or Jasper
Silicon Dioxide (SiO2)
sedimentary
Sandstone (Quartzite-rich Cobble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Selenite
Gypsum (CaSO4·2H2O), specifically the crystalline variety Selenite
Mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Moonstone (Tumbled)
Orthoclase Feldspar (KAlSi3O8) with inclusions of Albite
mineral
Green Aventurine
SiO2 (Silicon Dioxide) with Fuchsite inclusions
mineral
Chalcopyrite (Peacock Ore)
Chalcopyrite (CuFeS2)
mineral
Sandstone
Arenite or Sandstone
Sedimentary Rock
Citrine Geode Fragment
Citrine (Silicon Dioxide with Iron Impurities), SiO2
mineral
Sandstone (Ferruginous)
Arenite (with Iron Oxide cement)
sedimentary
Picasso Stone
Metamorphosed Calcium Carbonate (Limestone)
sedimentary
Black Chert
Chert (microcrystalline quartz)
Mineral
Jasper (specifically Brecciated or Agated Jasper)
Silicon Dioxide (SiO2) - Chalcedony with impurities
Mineral / Sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Chert (Iron-stained)
Chert (SiO2 - Silicon Dioxide)
sedimentary
Chert / Flint
Chert (Cryptocrystalline Silica, SiO2)
sedimentary
Graphite
Graphite (Native Carbon, C)
Mineral
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Granite
Granite (a common rock type, not a single mineral; composed primarily of Quartz, Feldspar (Orthoclase and Plagioclase), and Mica (Biotite and/or Muscovite) and/or Amphibole)
Igneous
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Bloodstone (Heliotrope)
Silicon Dioxide (SiO2) with inclusions of Chlorite or Actinolite
sedimentary
Satin Spar Selenite
Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)
mineral
Granite Pebble
Granite (Phaneritic intrusive igneous rock consisting of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Fire Agate (Crackle Agate)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Native Copper
Native Copper (Cu)
mineral
Chert (Common Opal/Agate inclusion)
Microcrystalline Quartz (SiO2)
sedimentary
Agate
Silicon Dioxide (SiO2)
mineral
Chert (specifically Flint)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Red Jasper (Polished)
Jasper (Iron-rich Microcrystalline Quartz, SiO2)
sedimentary
Limonite/Goethite (Iron Ore)
Hydrous ferric oxides (FeO(OH)·nH2O)
mineral
Granite Pebble
Intrusive Felsic Igneous Rock (primarily SiO2 with Al2O3, K2O, Na2O)
igneous
Dalmation Stone (often called Dalmatian Jasper)
Antiperthite-rich Microgranite
igneous