Gold Nugget
Native Gold (Au)
mineral
Category
Synthetic Or Natural Fiber
Browse synthetic or natural fiber specimens identified by the Rock Identifier community.
Learn about Synthetic Or Natural Fiber in the encyclopedia
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Diamond
Carbon (C)
mineral
Amethyst
Silicon dioxide with iron impurities (SiO2)
mineral
Amethyst
Silicon Dioxide with Iron impurities (SiO2)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Moonstone
Orthoclase Feldspar (KAlSi3O8) or Albite mixtures
mineral
Citrine Quartz
Silicon Dioxide (SiO2) with ferric iron impurities
mineral
Tektite (Indochinite)
Tektite (Natural silica glass)
igneous
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Diamond
Carbon (C)
mineral
Smoky Quartz (with possible Feldspar inclusions)
Silicon Dioxide (SiO2)
mineral
Sandstone (with potential Quartzite characteristics)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Amethyst
Amethyst (variety of Quartz, SiO2)
mineral
Pearl
Calcium Carbonate (CaCO3) with Conchiolin
mineral
Copper
Native Copper (Cu)
mineral
Diamond (faceted)
Diamond (Pure Carbon, C)
mineral
Prasiolite
Silicon Dioxide (SiO2) with iron impurities
mineral
Travertine (Ceramic Tile)
Terrestrial Sedimentary Rock / Calcium Carbonate (CaCO3)
sedimentary
Diamond
Diamond (pure carbon, C)
mineral
Sandstone (Graywacke type)
Clastic Sedimentary Rock (Lithic Sandstone)
sedimentary
Diamond (in jewelry setting)
Diamond (Carbon, C)
mineral
Diamond
Carbon (C)
gemstone
Granite
Phaneritic intrusive felsic igneous rock
igneous
Diamond
Diamond (C)
mineral
Diamond
Diamond (Pure Carbon, C)
mineral
Crushed Stone / Gravel (Multiple Rock Types)
Lithic fragments (undifferentiated)
Igneous, Sedimentary, and Metamorphic mix
Diamond
Diamond (pure Carbon, C)
mineral
Blue Goldstone
Aventurine Glass (Silicon Dioxide with metal inclusions)
man-made glass mineral simulant
Lapis Lazuli (Simulated)
Lapis Lazuli (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2
metamorphic
Amethyst (Pale/Light Variety)
Quartz (Silicon Dioxide) with Iron impurities - SiO2
mineral
Hag Stone
Perforated Sedimentary Rock (primarily Siltstone or Mudstone)
sedimentary
Dyed Imperial Jasper (Sea Sediment Jasper)
Silicon Dioxide (SiO2) - Impure Quartz/Chalcedony
sedimentary
Dyed Agate Slice
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Pearl
Aragonite (CaCO3) with Conchiolin
mineral
Diamond
Carbon (C)
mineral
Beryl (Emerald variety in host rock)
Be3Al2(SiO3)6 (Silicate mineral)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Herkimer Diamond
Quartz (Silicon Dioxide, SiO2)
mineral
Diamond
Carbon (C)
mineral
Diamond
Carbon (C)
mineral