Sandstone
Sandstone (Siliciclastic Sedimentary Rock)
sedimentary
Category
Organic Gemstone (Not A Mineral)
Browse organic gemstone (not a mineral) specimens identified by the Rock Identifier community.
Learn about Organic Gemstone (Not A Mineral) in the encyclopedia
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Pyrite (Fool's Gold) in Matrix
Iron Disulfide (FeS2)
mineral
Sandstone
Arenite
sedimentary
Sandstone
Arenite
sedimentary
Pyrite in Matrix (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Chert (often called Flint or Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert (Black Chert or Flint)
Silicon Dioxide (SiO2)
sedimentary
Shark Tooth Fossil
Vertebrate fossilized tooth (various genera such as Carcharodon, Otodus, or Negaprion)
fossil
Amber
Succinite (fossilized tree resin)
mineraloid / sedimentary organic material
Sandstone
Sandstone (SiO2-dominated clastic rock)
sedimentary
Fossilized Bone
Permineralized Vertebrate Fossil
sedimentary
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Fancy Jasper
Silicon dioxide (SiO2)
sedimentary
Fossil Shark Tooth
Otodus sp. or Carcharocles sp. (likely fossilized Chondrichthyes)
fossil
Probable amber fragment
Amber (fossilized plant resin; chiefly amorphous organic resin, commonly dominated by succinite)
gemstone
Shale
Laminated Fissile Pelite
sedimentary
Amber
Succinite (a fossilized organic resin containing succinic acid)
mineraloid
Chert (and Flint variant)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Smoky variety)
Microcrystalline Quartz (SiO2)
sedimentary
Fossil Shell
Brachiopod or Mollusk fossil
fossil
Grass (Organic Matter/Soil)
Poaceae (family of monocotyledonous flowering plants)
Organic Materia (Not a rock or mineral)
Fossilized Shark Tooth
Carcharocles or Otodus sp. (Micro-fossilized)
sedimentary
Quartz-veined Limestone
Sedimentary limestone with quartz/calcite veinlets
sedimentary
Amber
Succinite
Organic Mineraloid
Chert (Banded Variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (often called Flint in archaeological contexts)
Silicon Dioxide (SiO2)
sedimentary
Fossilized Shell
Invertebrate fossil (Bivalvia or Brachiopoda)
fossil
Sand Tiger Shark Tooth
Carcharias taurus
fossil
Chert (Flint)
Silicon dioxide (SiO2)
sedimentary
Chert (including Flint and Jasper variants)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (specifically Flint or Jasper variant)
Cryptocrystalline Quartz (SiO2)
sedimentary
Hypersthene
Hypersthene ((Mg,Fe)SiO3)
mineral
Chert with Calcite Veins
Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3) intrusions
sedimentary
Chert / Flint
Cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone with Quartz Crystal Infill
Quartz-cemented quartz arenite
sedimentary
Picasso Jasper (or Picasso Marble)
Metamorphosed Limestone (Calcium Carbonate, CaCO3, with impurities)
metamorphic
Fossil Shark Tooth
Carcharocles (Otodus) sp. or similar fossilized Chondrichthyes tooth
sedimentary
Chert (Jasper/Chalcedony)
Microcrystalline Silica (SiO2)
sedimentary
Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Chert (specifically Red Chert or Jasper)
Microcrystalline Quartz (SiO2)
sedimentary