Dolomite on Prehnite (Saddle-shaped Dolomite)
Dolomite [CaMg(CO3)2] on Prehnite [Ca2Al(AlSi3O10)(OH)2]
Category
Browse not a rock (animated character) specimens identified by the Rock Identifier community.
Dolomite on Prehnite (Saddle-shaped Dolomite)
Dolomite [CaMg(CO3)2] on Prehnite [Ca2Al(AlSi3O10)(OH)2]
Quartzite
Quartzite (primarily SiO2)
Green Aventurine
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
Gneiss
Gneiss (High-grade metamorphic rock)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Limestone
Calcium Carbonate (CaCO3)
Chert (Nodule)
Microcrystalline Quartz (SiO2)
Brecciated Jasper
Silicon Dioxide (SiO2) with varying mineral inclusions (Iron Oxide, Hematite, Clay)
Hematite (Iron Ore)
Hematite (Fe2O3)
Sunstone (Feldspar variety)
Oligoclase or Andesine (Na,Ca)(Al,Si)4O8
Smoky Quartz
Silicon Dioxide (SiO2)
Rhodonite in Quartz Matrix
Rhodonite (Manganese Silicate - (Mn,Fe,Mg,Ca)SiO3)
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals, (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)
Anthracite Coal
Anthracite (Carbon-based organic sedimentary rock exposed to metamorphic heat/pressure; Chemical composition is approximately 86%–98% Carbon)
Gold Nugget / Flake
Native Gold (Au)
Asphalt (Bituminous Concrete)
Composite material (bitumen binder with mineral aggregate)
Amygdaloidal Rhyolite
Amygdaloidal Rhyolite (Felsic volcanic rock)
Quartzite
Quartzite (SiO2)
Marble
Marble (primarily Calcite, CaCO3 or Dolomite, CaMg(CO3)2)
Hematite (beads)
Hematite (Fe₂O₃)
Quartzite
Quartzite (primarily SiO2)
Obsidian
Volcanic Glass (Extrusive Igneous Rock, primarily SiO2)
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
Greenstone (Epidote/Chlorite Schist)
Metabasalt (composed primarily of Epidote Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH) and Chlorite (Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6)
Clear Quartz (Carved Dragon)
Quartz (Silicon Dioxide, SiO2)
Chert Pebble (Flint)
Microcrystalline/Cryptocrystalline Quartz (SiO2)
Moldavite
Tektite (Impact Glass), ~80% SiO2 + Al2O3
Blue Dyed Agate Geode
Chalcedony (cryptocrystalline Quartz), SiO2
Rhodonite
Manganese Inosilicate (MnSiO3)
Ironstone Concretion (likely)
Goethite/Hematite/Limonite cemented sediment
Jasper
Silicon Dioxide (SiO2)
Agate
Silicon Dioxide (SiO2)
Fluorite
Calcium Fluoride (CaF2)
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities
Agate Geode / Thunderegg
Chalcedony (cryptocrystalline variety of Quartz), SiO2
Blue Agate (Dyed)
Silicon Dioxide (SiO2)
Sapphire
Corundum (Al2O3)
Jasper (specifically Fancy Jasper or Bloodstone variety)
Silicon Dioxide (SiO2) with impurities (Iron oxides/silicates)
Green Aventurine (likely)
Silicon dioxide (SiO2) with fuchsitemica inclusions
Almandine Garnet
Almandine - Fe3Al2(SiO4)3
Green Aventurine
Silicon Dioxide (Quartz) with inclusions (SiO₂)
Turquoise
Turquoise - CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)