Aquamarine
Beryl (Be3Al2Si6O18), specifically the blue-green variety
Category
Browse sedimentary (primary) with artificial modification specimens identified by the Rock Identifier community.
Aquamarine
Beryl (Be3Al2Si6O18), specifically the blue-green variety
Sandstone (likely Arkosic or Lithic Sandstone)
Clastic Sedimentary Rock (SiO2 with assorted minerals)
Sandstone (Ferruginous)
Arenite (Fe2O3 stained)
Sandstone (Ferruginous)
Sandstone (mainly SiO2 with Fe2O3 staining)
Sandstone (Ferruginous)
Arenite (with Iron Oxide cement)
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz - SiO2)
Sandstone (Ferruginous)
Ferruginous Sandstone (SiO2 with iron oxide cement)
Sandstone or Limestone
Arenite or Calcareous Sedimentary Rock
Sandstone (Ferruginous)
Arenite (Siliclastic Sedimentary Rock)
Sandstone
Arenite (SiO2 dominant)
Sandstone with Quarzite clasts
Arenite (SiO2 based)
Sandstone (likely Quartzose Sandstone)
Arenite (composed primarily of SiO2)
Diorite (Dalmatian Stone)
Phaneritic Plutonic Diorite
Chert (specifically Red Chert/Jasper)
Microcrystalline Quartz (SiO2)
Chalcedony (variations like Agate or Jasper)
Chalcedony (SiO₂ - microcrystalline quartz)
Sapphire (Corundum)
Corundum (Al2O3), variety Sapphire
Sandstone
Arenite (Sedimentary rock comprising sand-sized grains)
Ruby
Corundum (Al₂O₃) with Chromium (Cr)
Sandstone (clastic)
Clastic Sedimentary Rock (primarily composed of SiO2)
Sandstone
Clastic Sedimentary Rock (primarily Quartz, SiO2)
Sandstone
Arenite (composed primarily of SiO2)
Sandstone
Arenite
Sandstone (likely Calcareous or Quartz-rich)
Arenite (SiO2 based typically)
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 cement)
Chert (Jasper/Agate variety)
Microcrystalline Quartz (SiO2)
Precious Opal
Hydrated Silica (SiO2·nH2O)
Sandstone
Arenite (primarily SiO2)
Desert Varnish on Sandstone
Ferromanganese coating on Quartz Arenite
Sandstone (likely Siltstone)
Arenite or Siltstone (high SiO2 content)
Chert / Flint
Microcrystalline Quartz (SiO2)
Sandstone (with Limonite staining)
Arenite (primarily SiO2 with FeO(OH)·nH2O)
Opal
Hydrated Silica (SiO2·nH2O)
Conglomerate
Polymictic Conglomerate
Limestone (specifically Bituminous or Carbonaceous Limestone)
Calcium Carbonate (CaCO3) with Organic Impurities
Limonite (Ironstone)
Hydrated Iron Oxide (FeO(OH)·nH2O)
Sandstone
Arenite (SiO2 primarily)
Sandstone (Ferruginous)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 staining)
Rose Quartz
Rose Quartz (SiO₂)
Sandstone (likely Quartzose Sandstone)
Arenite (primarily SiO2)
Sandstone (with Feldspathic/Arkose qualities)
Arenite (primarily SiO2 with KAlSi3O8 components)
Sandstone
Arenite
Sandstone
Clastic sedimentary rock (primarily SiO2)