Jasper with Hematite Inclusions
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)
sedimentary
Category
Man Made Material (Simulated Mineral)
Browse man made material (simulated mineral) specimens identified by the Rock Identifier community.
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Ruby in Kyanite
Al2O3 (Corundum) in Al2SiO5 (Kyanite-Fuchsite-Quartz)
metamorphic
Eudialyte in Syenite (Dragon Blood Stone)
Na15Ca6(Fe,Mn)3Zr3(Si25O73)(O,OH,H2O)3(Cl,OH)2
igneous
Scoria
Scoria (a vesicular basalt or andesite)
igneous
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(F,OH)2)
mineral
Petrified Wood
Silicified Wood (SiO2)
fossil
Fossilized Bone
Vertebrate fossil (mineralized bone)
fossil
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement
sedimentary
Chiastolite
Andalusite (Al2SiO5) with carbonaceous inclusions
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Kyanite
Al2SiO5
mineral
Weathered granite pebble
Granite, chiefly quartz (SiO₂), feldspar, and mica/amphibole
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Iron-stained quartz-rich rock, possibly jasper/quartzite
Quartz (SiO₂) with iron-oxide staining; likely ferruginous quartzite or jasper
metamorphic
Weathered basaltic rock fragment
Basalt, likely porphyritic or amygdaloidal basalt with weathered iron-oxide-rich zones
igneous
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with Bioclasts
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Gneissic Granite
Granite Gneiss
metamorphic
Quartz, Sandstone, and Siltstone specimens
Silicon Dioxide (SiO2) and Clastic Sedimentary Rocks
mineral and sedimentary
Granite (likely weathered quartz-bearing granite)
Granite; primarily quartz, feldspar, and mica/amphibole
igneous
Quartz-rich granite or pegmatitic rock
Granite/pegmatite; chiefly quartz (SiO₂), feldspar, and minor mica
igneous
Gastropod Fossil
Class Gastropoda (fossilized)
fossil
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
mineral
Chalcedony (Agate/Chert variety)
Silicon Dioxide (SiO2)
mineral
Schist
Mica Schist (primarily consisting of muscovite, biotite, and quartz)
metamorphic
Tiger's Eye
Quartz with riebeckite inclusions (SiO2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Granite
Granite (Felsic Plutonic Rock)
igneous
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Milky quartz with iron-oxide staining
Quartz (silicon dioxide, SiO₂)
mineral
Tumbled basalt (likely)
Basalt; primarily plagioclase feldspar, pyroxene, and commonly olivine
igneous
Diamond (or Diamond Simulant)
Carbon (C) if diamond, various if simulant (e.g., Cubic Zirconia ZrO2)
gemstone
Sandstone
Arenite
sedimentary
Sandstone
Quartzose Sandstone (Sedimentary Rock)
sedimentary
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (composed mostly of SiO2)
sedimentary
Sandstone (with potential iron mineralization)
Arenite
sedimentary
Sandstone (Ferruginous)
Clastic Sedimentary Rock (Litharenite)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Clastic Sedimentary Rock (composed of SiO2 grains)
sedimentary
Diamond (in Jewelry)
Diamond (Carbon, C)
mineral