Pyrite Geode
Iron Disulfide (FeS2)
mineral
Category
Organic Materia (Not A Rock Or Mineral)
Browse organic materia (not a rock or mineral) specimens identified by the Rock Identifier community.
Amber
Succinite (fossilized tree resin), C10H16O
Organic Gemstone
Jasper (specifically a banded or dark variety)
Silicon Dioxide (SiO2) with impurities
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Green Jasper (with Quartz veining)
Jasper (Silica-rich microcrystalline variety of Quartz), formula: SiO2
sedimentary
Coquina Limestone (Fossiliferous Limestone)
Calcareous bioclastic sedimentary rock (CaCO3)
sedimentary
Limestone (specifically Fossiliferous or Crinoidal Limestone)
Calcium Carbonate (CaCO3) - Calcite Rock
sedimentary
Banded Chert (or Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Banded Chert (River Siltstone)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Arrowhead/Artifact Fragment)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Chert (Jasper/Flint variant)
Silicon Dioxide (SiO2)
sedimentary
Pearl (incorporated into jewelry)
Aragonite and Calcite (CaCO3)
mineral
Chert / Pink Flint
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (with Liesegang Banding)
Microcrystalline quartz (SiO2)
sedimentary
Crushed Limestone
Calcite-rich Sedimentary Rock (CaCO3)
sedimentary
Amber / Fossilized Resin
Succinite / Fossilized Tree Resin
mineral
Chert / Flint
Silicon Dioxide (SiO2)
sedimentary
Chert (Brown variety)
Silicon Dioxide (SiO2)
sedimentary
Fossiliferous Shale Matrix
Clastic Sedimentary Rock with Brachiopod or Mollusk shell fragments
sedimentary
Chert (River Cobble)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Oak-grain Laminate (Industrial/Decorative Furniture Finish)
Melamine Resin-impregnated Decorative Paper on Particleboard (Cellulose/Thermosetting Plastic)
not a rock (synthetic material)
Anthracite Coal
Anthracite (Carbon-based metamorphic rock, 86-97% C)
metamorphic
Amber
Succinite (fossilized resin)
mineral
Potassium-Rich Silicate Clay (inferred from biological context)
Phyllosilicate group (likely Illite or Smectite within surrounding soil substrate)
mineral
Synthetic Resin Charm (Seal Shape)
Polymer Resin with plastic glitter / Polyethylene terephthalate glitters
Synthetic material (Not a rock or mineral)
Bouncy Ball (Synthetic Rubber Polymer)
Polybutadiene / Ethylene Vinyl Acetate (EVA)
Synthetic material (Not a rock or mineral)
Chert (Grey-Green Var.)
Silicon Dioxide (SiO2)
sedimentary
Amber in Matrix
Succinite (Carbon-based organic polymer)
Organic (Sedimentary context)
Amber
Succinite (fossilized resin)
Mineral
Amber
Succinite (fossilized tree resin)
Organic Mineraloid
Chert Pebble (with Quartz Vein)
Chert (Cryptocrystalline Silica - SiO2)
sedimentary
Man-made Ceramic / Clay Figurine
Aluminosilicate Ceramic (Processed Clay)
Synthetic (not a rock or mineral)
Chert (Yellow Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Chert Nodule with Cortex)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Slate
Slate (foliated metamorphic rock, primarily composed of quartz, illite, chlorite, and micas)
metamorphic
Chert (River Pebble)
Microcrystalline quartz (SiO2)
sedimentary
Amber
Succinite (fossilized resin)
mineral
Banded Chert (with Quartz Vein)
Microcrystalline Silica (SiO2)
sedimentary
Chert (Cherty Flint/Jasper variety)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Quartz Pebble)
Silicon Dioxide (SiO2)
sedimentary
Limestone (Porous/Travertine variant)
Sedimentary Calcium Carbonate (CaCO3)
sedimentary