Ruby
Corundum (Al2O3 with Chromium trace impurities)
mineral
Category
Synthetic (Man Made Material Mimicking Natural Stone)
Browse synthetic (man made material mimicking natural stone) specimens identified by the Rock Identifier community.
Bituminous Coal (with Anthracite or Vitrinite inclusion)
Organic-rich Sedimentary Rock (Carboniferous classification)
sedimentary
Fluorite (Polished Point/Tower)
Calcium Fluoride (CaF2)
mineral
Citrine
Quartz (SiO₂)
mineral
Diamond (or Diamond Simulant like Cubic Zirconia)
Carbon (C) - if Diamond; Zirconium dioxide (ZrO2) - if Cubic Zirconia
mineral
Bismuth
Bismuth (Bi)
mineral
Granite
Granite (a common rock type, not a single mineral; composed primarily of Quartz, Feldspar (Orthoclase and Plagioclase), and Mica (Biotite and/or Muscovite) and/or Amphibole)
Igneous
Diamond (in a jewelry setting)
Cubic Carbon (C)
mineral
Pearl
Aragonite (CaCO3) with Conchiolin
mineral
Synthetic Wolf Plush (Non-mineral)
Canis lupus similis (Prop material: Polyester & Synthetic fibers)
Synthetic material/Textile
Coquina
Biogenic Limestone (Coquina)
sedimentary
Green Calcite
Calcite (CaCO3)
mineral
Portable Ceramic Space Heater
Polished Acrylonitrile Butadiene Styrene (ABS) Plastic with Ceramic Heating Elements
not a rock (synthetic/industrial object)
Pyrite
Iron Sulfide (FeS2)
mineral
Corundum
Corundum (Al2O3)
Mineral
Diamond
Natural Carbon (C)
mineral
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Silty Shale
Silty Shale (Fissile Sedimentary Rock)
sedimentary
Sandstone
Sandstone (Sedimentary rock composed of silicate grains)
sedimentary
Diamond
Carbon (C)
mineral
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Puddingstone (Jasper Conglomerate)
Conglomerate (specific type: Jasper Conglomerate or Hertfordshire Puddingstone)
Sedimentary
Micaceous Rock (likely Muscovite Schist/Gneiss or a Muscovite-rich Specimen)
Predominantly Muscovite (KAl2(AlSi3O10)(F,OH)2), often found in rocks like Muscovite Schist or Muscovite Gneiss.
Metamorphic, Mineral (within a rock type)
Diamond
Diamond (pure Carbon, C)
mineral
Rough Diamond
Diamond (pure carbon, C)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone (Quartzose Sandstone)
Arenite
sedimentary
Engineer Quartz/Quartzite
SiO2 (Silicon Dioxide with binders)
Sedimentary or metamorphic-derived
Ruby
Corundum (Aluminium Oxide with Chromium impurities, Al2O3:Cr)
mineral
Rough Quartz (Alluvial Pebbles)
Silicon Dioxide (SiO2)
mineral
Granite
Granite (a felsic intrusive igneous rock)
igneous
Banded Black Onyx (Chalcedony)
Silicon Dioxide (SiO₂)
mineral
Diamond (or Diamond Simulant/Cubic Zirconia)
Carbon (C) - if diamond, or Zirconium dioxide (ZrO2) - if Cubic Zirconia
mineral
Sandstone (with minor quartz and possible clay components)
Clastic Sedimentary Rock (SiO2 dominated)
sedimentary
Yellow Ochre / Limonite
Limonite (inter-mixed iron oxides and hydroxides, primarily FeO(OH)·nH2O)
mineral
Diamond
C (Carbon)
mineral
Diamond
C (Carbon)
mineral
Sandstone (Quartz-rich)
Arenite (composed mainly of SiO2)
sedimentary
Sandstone Geode (Ironstone Concretion)
Arenite with Limonite/Hematite matrix (SiO2 with Fe-oxides)
sedimentary
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Limonite (Iron Ore)
Limonite (Hydrous iron(III) oxide-hydroxide mixture, primarily FeO(OH)·nH2O)
mineral