Red Jasper
Red Jasper (SiO2 with Hematite inclusions)
mineral
Category
Synthetic Or Natural Fiber
Browse synthetic or natural fiber specimens identified by the Rock Identifier community.
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Magnetite (likely in Hematite or Ironstone)
Magnetite (Fe3O4)
mineral
Howlite
Howlite (Calcium Borosilicate Hydroxide: Ca2B5SiO9(OH)5)
mineral
Sandstone
Arenite
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Yellow Sapphire (Raw)
Corundum (Al2O3)
mineral
Yellow Quartz (Citrine or Iron-Stained Quartz)
Silicon Dioxide (SiO2)
mineral
Garnet
Garnet group: X3Y2(SiO4)3 (commonly Almandine-Pyrope series)
mineral
Quartz (Citrine variety)
Silicon Dioxide (SiO2)
mineral
Yellow Quartz (Citrine or Quartzite Pebble)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Sapphire Rough (Corundum)
Corundum (Aluminum Oxide, Al2O3)
mineral
Diamond / Clear Quartz / Glass paste
Carbon (Diamond) / Silicon Dioxide (Quartz)
gemstone
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Magnetite with Serpentine
Magnetite (Fe3O4) in Serpentine Matrix
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Bort or Carbonado
C - Polycrystalline Diamond
mineral
Magnetite (in matrix)
Magnetite (Fe3O4)
mineral
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Coquina
Bioclastic Limestone (Coquina)
sedimentary
Blue Topaz
Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)
mineral
Dyed Agate
SiO2
Mineral
Blue Onyx (Dyed Agate/Chalky Chalcedony)
Silicon Dioxide (SiO2) with artificial pigment
mineral
Diamond
Diamond (C)
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Gold Nugget
Native Gold (Au)
mineral
Granite
Granite (composed primarily of Quartz, Feldspar, and Mica)
igneous
Smoky Quartz
SiO2 (Silicon Dioxide with aluminum impurities)
mineral
Diamond (in jewelry setting)
Diamond (C - Pure Carbon)
mineral
Ruby and Diamond in Gold Setting
Corundum (Al2O3) and Diamond (C)
mineral
Diamond
Native Carbon (C)
mineral
Diamond
C (Carbon)
mineral
Magnetite
Magnetite (Fe3O4)
mineral
Black Pearl (Tahitian Style)
Calcium Carbonate (Aragonite) - CaCO3 with Conchiolin
mineral
Diamond (Colorless/White)
Carbon (C)
mineral
Moissanite
Silicon Carbide (SiC)
mineral
Picture Jasper
Silicon dioxide (SiO2)
sedimentary
Diamond
Diamond (C)
mineral
Citrine
Silicon Dioxide (SiO₂)
mineral