Blue Quartz (specifically Dumortierite Quartz)
SiO2 (Silicon Dioxide) with inclusions of AlAl6BSi3O18 (Dumortierite)
mineral
Category
Not A Rock (Animated Character)
Browse not a rock (animated character) specimens identified by the Rock Identifier community.
Agate
Silicon Dioxide (SiO2) - Cryptocrystalline Chalcedony
Mineral
Black Sapphire (Basaltic Blue Sapphire)
Corundum (Al2O3)
mineral
Ruby (Corundum)
Corundum (Aluminum Oxide with Chromium), Al2O3:Cr
mineral
Epidote
Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)
mineral
Sagenitic Agate (with Goethite/Rutile inclusions)
Silicon Dioxide (SiO2) with hydrous ferric oxide inclusions
mineral
Native Copper (Penny specimen)
Native Copper (Cu)
mineral
Bloodstone (Heliotrope)
Chalcedony (SiO2) with inclusions of Iron Oxide or Red Jasper
mineral
Staurolite
Staurolite (Fe2+2Al9Si4O23(OH))
metamorphic
Concrete / Anthropogenic Conglomerate
Man-made composite material (Portland cement, aggregate, and water)
not a natural rock
Phyllite
Phyllite
metamorphic
Chert Geode or Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Almandine Garnet
Iron aluminum silicate (Fe3Al2(SiO4)3)
mineral
Quartzite (or Milky Quartz pebble)
Quartzite (primarily Silicon Dioxide, SiO2)
metamorphic
Moss Agate
Silicon Dioxide with inclusions (SiO2 + impurities)
mineral
Amazonite
K(AlSi3O8) - Microcline variant
mineral
Ironstone with Limonite/Goethite coating
Ferruginous Sedimentary Rock (contains Limonite FeO(OH)·nH2O)
sedimentary
Agate with Quartz Druzy
Silicon Dioxide (SiO2) - Microcrystalline and Macrocrystalline varieties
mineral
River Rock (Glacial Cobbles)
Fluvial Alluvium (Mixed lithology including Quartzite, Basalt, and Granite)
Mixed (predominantly sedimentary and igneous)
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Yellow Jasper
Chalcedony (SiO2) with iron oxide inclusions
mineral
Bumblebee Jasper
Calcite with Arsenic and Manganese oxides (technically a volcanic rock)
igneous
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Yellow Jasper
Silicon Dioxide with Iron inclusions (SiO2)
sedimentary
Schist
Mica Schist (contains muscovite/biotite and quartz)
metamorphic
Marble
Recrystallized Calcite / Dolomite (CaCO3)
metamorphic
White Agate (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Garnet-Mica Schist
Garnetiferous Porphyroblastic Schist
metamorphic
Granite (Alkali-feldspar rich)
Phaneritic Felsic Igneous Rock (Major components: KAlSi3O8, SiO2)
igneous
Rhodonite
Rhodonite (Manganese Silicate), chemical formula: (Mn,Fe,Mg,Ca)SiO3
Mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Smoky Quartz (Silicon Dioxide - SiO2)
mineral
Red Jasper (Opaque Chalcedony)
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
mineral
Dendritic Opal (Common Opal)
Amorphous Hydrated Silica (SiO2·nH2O) with Manganese or Iron Oxide inclusions
mineral
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Biotite Schist
Biotite Schist
metamorphic
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Schist (Garnet-Mica Schist)
Garnetiferous Mica Schist (primarily Muscovite/Biotite and Almandine Garnet)
metamorphic
White Marble
Calcite-rich Metasomatized Carbonate (CaCO3)
metamorphic
Lapis Lazuli
Complex metamorphic rock consisting mainly of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite
metamorphic
Mookaite Jasper
Silicified Radiolarite (SiO2)
sedimentary