Rough Diamond
Diamond (pure Carbon, C)
Category
Browse sedimentary (primary) with artificial modification specimens identified by the Rock Identifier community.
Rough Diamond
Diamond (pure Carbon, C)
Diamond (faceted)
Diamond (Pure Carbon, C)
Diamond
Diamond (pure Carbon, C)
White Sapphire
Corundum (Al2O3)
Glaucophane-bearing Schist (Blueschist)
Blueschist (Glaucophane-Lawsonite Schist)
Anthracite Coal
Anthracite
Stilbite
Stilbite-Ca (NaCa4(Si27Al9)O72·28H2O)
Placer Gold Nugget
Native Gold (Au)
Ruby (Corundum)
Al2O3 (Aluminium oxide with Chromium impurities)
Basalt
Basalt (extrusive igneous rock)
Cone-in-cone structure (Limestone)
Cone-in-cone structure (Secondary Sedimentary Structure)
Sandstone or Siltstone
Arenite (if sandstone)
Fuchsite
K(Al,Cr)2(AlSi3O10)(OH)2 (Chromium-rich Muscovite)
Sandstone
Arenite (primarily SiO2)
Ferruginous Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2) with iron oxide inclusions/staining (Limonite/Hematite)
Schist
Mica Schist (variety: Muscovite/Biotite Schist)
Blue Quartzite
Quartzite (specifically a variety enriched with blue-coloring minerals)
Basalt
Mafic volcanic rock (Primary minerals: Plagioclase feldspar, Pyroxene)
Blue Topaz (specifically London Blue or Swiss Blue based on color saturation)
Al2SiO4(F,OH)2 (Aluminum Silicate Fluoride Hydroxide)
Ferruginous Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
Jadeite Jade
Jadeite (Sodium Aluminum Silicate, NaAlSi₂O₆)
Lazulite
Lazulite (Mg,Fe2+)Al2(PO4)2(OH)2
Basalt
Basalt (Mafic Extrusive Igneous Rock)
Amber
Succinite (Formula: C10H16O)
Diamond
Diamond (carbon allotrope), C (chemical formula)
Rutilated Quartz (or Tourmalinated Quartz if inclusions are Tourmaline)
Silicon Dioxide (SiO2) with Rutile (TiO2) or Tourmaline inclusions
Basalt
Basalt (Mafic volcanic rock)
Rhodonite
Rhodonite (MnSiO3)
Ruby
Corundum (Al2O3 with Chromium traces)
Sandstone Grain
Clastic Sedimentary Rock Grain (SiO2 dominated)
Halite (Rock Salt)
Halite; NaCl (Sodium Chloride)
Peridot
Olivine ((Mg,Fe)2SiO4)
Seraphinite
Clinochlore (a variety of the chlorite group)
Chert Breccia
Brecciated Chert (Microcrystalline Silica)
Shale or Slaty Mudstone
Argillaceous sedimentary rock
Sandstone
Arenite
Arsenopyrite with Quartz
Arsenopyrite (FeAsS)
Galena
Lead(II) sulfide (PbS)
Sandstone (with man-made markings)
Arenite (composed primarily of Quartz, SiO2)
Bloodstone
Heliotrope (a variety of Chalcedony, SiO₂ with inclusions)
Sandstone (Quartz-rich)
Arenite (SiO2)
Amethyst
SiO2 (Silicon Dioxide) - a variety of Quartz