Ferruginous Quartzite (Red Chert/Jasper-like)
Metamorphosed Quartzite with Hematite inclusions (SiO2 + Fe2O3)
Category
Browse sedimentary (primary) with artificial modification specimens identified by the Rock Identifier community.
Ferruginous Quartzite (Red Chert/Jasper-like)
Metamorphosed Quartzite with Hematite inclusions (SiO2 + Fe2O3)
Amethyst
Silicon Dioxide (SiO2) with iron impurities
Diamond (Green tinted)
Carbon (C) with trace impurities or lattice defects
Soapstone (Talc Schist)
Steatite
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Lapis Lazuli
Lapis Lazuli (a rock type, not a single mineral; main component is Lazurite (Na,Ca)8[(S,Cl,SO4,OH)2|(Al6Si6O24)])
Azurite Geode
Azurite (Cu3(CO3)2(OH)2)
Sandstone or Siltstone
Arenite (if sandstone)
Sandstone
Arenite (primarily SiO2)
Peridotite (with Olivine and Pyroxene)
Ultramafic Magmatic Rock (Primary minerals: (Mg, Fe)2SiO4 and (Ca, Mg, Fe)2Si2O6)
Garnet (almandine or pyrope variety)
Silicate mineral Group: (Fe, Mg, Mn, Ca)3(Al, Fe, Cr)2(SiO4)3
Diamond
Carbon (C)
Aquamarine
Beryl (Be3Al2Si6O18)
Diamond
Carbon (C)
Iron Meteorite
Siderite (Fe, Ni)
Cubic Zirconia (Simulated Diamond)
Zirconium Dioxide (ZrO2)
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
Lepidolite with Quartz
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
Quartz with Hematite Inclusions
Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)
Diamond
C (Carbon)
Cultured Marble (Synthetic)
Polymer-matrix composite (typically calcium carbonate in polyester resin)
Diamond (Faceted)
Carbon (C) - Diamond
Rough Diamond
Native Carbon (C)
Diamond (in a jewelry setting)
Cubic Carbon (C)
Anthracite Coal
Anthracite
Botryoidal Hematite (Iron Ore)
Iron(III) oxide (Fe2O3)
Diamond (as featured in jewelry)
Diamond (C - pure carbon)
White Marble
Recrystallized Calcite (CaCO3)
Aquamarine
Beryl (Be3Al2Si6O18 with Fe2+ trace elements)
Green Aventurine (Double-Terminated Wand)
Silicon Dioxide (SiO2) containing Fuchsite (Chromium-rich Muscovite Mica)
Black Obsidian
Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)
Obsidian
Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)
Obsidian
Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)
Obsidian (Black Obsidian)
Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)
Obsidian
Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)
Obsidian
Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)
Obsidian
Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)
Obsidian
Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)
Lapis Lazuli
Na8(Al6Si6O24)S2 (Lazurite is the primary constituent mineral)
Amethyst
Amethyst (Silicon Dioxide, SiO2 + Fe)
Magnetite
Magnetite (Fe3O4)
Chrome Diopside
Diopside (Magnesium Calcium Silicate) - CaMgSi2O6 + Cr