Basalt with Quartz/Calcite Vein
Basalt (Mafic Volcanic Rock with secondary mineralization)
igneous
Category
Granite
Browse granite specimens identified by the Rock Identifier community.
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Ruby
Corundum (Al2O3 with Chromium traces)
mineral
Tanzanite
Blue Zoisite (Ca2Al3(SiO4)(Si2O7)O(OH))
mineral
Pumice
Pumice (Vesicular volcanic glass)
igneous
Anthracite Coal
Anthracite (Carbon-based organic sedimentary rock transitioned to metamorphic)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Blue Celestite (with Galena)
Strontium sulfate (SrSO4) and Lead sulfide (PbS)
mineral
Ruby (Corundum)
Aluminium oxide (Al2O3) with Chromium traces
mineral
Ruby in Kyanite
Al2O3 (Corundum) in Al2SiO5 (Kyanite-Fuchsite-Quartz)
metamorphic
Tanzanite
Blue/Violet Variety of Zoisite (Ca2Al3(SiO4)3(OH))
mineral
Specular Hematite (Specularite) in Matrix
Specularite (Fe2O3)
mineral
Garnet (Pyrope or Almandine)
Silicate (X3Y2Si3O12)
mineral
Chromite
Chromite (FeCr2O4)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Coarse Sand Grain / Lithic Fragment
Clastic Sediment (Lithic fragment or Quartz/Feldspar grain)
sedimentary
Citrine
Silicon Dioxide (SiO2) with ferric iron impurities
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Magnetite (Iron Ore)
Iron(II,III) oxide (Fe3O4)
mineral
Sapphire
Corundum (Al2O3)
gemstone
Native Copper with Cuprite and Quartz
Copper (Cu), Cuprite (Cu2O), Quartz (SiO2)
mineral
Rough Diamond
Diamond (Native Carbon), C
mineral
Vesicular Basalt
Basalt with vesicular texture
igneous
Specular Hematite
Hematite (Fe2O3)
mineral
Diamond (faceted)
Diamond (Pure Carbon, C)
mineral
Anthracite Coal
Anthracite coal (High-rank coal)
sedimentary
Diamond (in a jewelry setting)
Carbon (C)
mineral
Native Gold Nugget
Native Gold (Au)
mineral
Galena
Lead(II) sulfide (PbS)
mineral
Rough Diamond
Diamond (pure carbon / C)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Cubic Zirconia
Zirconium Dioxide (ZrO2)
mineral
Cubic Zirconia (CZ) Jewelry
Zirconium dioxide (ZrO2)
mineral (synthetic)
Garnet (specifically Almandine or Pyrope)
Almandine (Fe3Al2Si3O12) or Pyrope (Mg3Al2Si3O12)
mineral
Ruby (Pinkish-Red)
Corundum (Al2O3 with Chromium trace)
mineral
Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Ruby
Corundum (Al2O3 with Chromium traces)
mineral
Chrome Diopside
Magnesium Calcium Silicate (MgCaSi2O6) containing Chromium impurities
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Sodalite
Sodalite - Na8(Al6Si6O24)Cl2
mineral