Banded Iron Formation
Banded Iron Formation (BIF)
sedimentary
Category
Mineral (Synthetic Paper And Ink Polymorph)
Browse mineral (synthetic paper and ink polymorph) specimens identified by the Rock Identifier community.
Zebra Rock / Zebra Marble
Banded Limestone-Marble Transition
metamorphic
Opalite
Man-made Glass (SiO2 + additives)
mineraloid (synthetic)
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Banded Sandstone
Arenite (with iron oxide banding)
sedimentary
Banded Gneiss
Gneiss (Metamorphic high-grade, predominantly SiO2, Al2O3, K2O, Na2O)
metamorphic
Petoskey Stone
Hexagonaria percarinata
sedimentary
Diorite
Diorite (intermediate intrusive igneous rock)
igneous
Granite with Orthoclase and Hematite Staining
Phaneritic Felsic Igneous Rock (primarily SiO2 with KAlSi3O8)
igneous
Marble
Recrystallized Limestone (CaCO3)
metamorphic
Orthoceras Fossil in Limestone
Orthoceras regulare
sedimentary
Opalite
Synthetic Fluorescent Glass (SiO2 + impurities)
mineraloid (synthetic)
Banded Agate (specifically shades of Carnelian Agate)
Silicon Dioxide (SiO2)
mineral
Synthetic Costume Glove (Paws)
Polyethylene terephthalate (Polyester) & Polyurethane blend
Non-geological / Man-made textile
Artificial Rock Face (Faux Rock)
Glass Fiber Reinforced Concrete (GFRC)
man-made/construction material
Amber
Succinite (Formula: C10H16O)
Mineraloid
Agate
Silicon Dioxide (SiO2) - Banded Chalcedony
mineral
Fossil Coral (Rugosa or Solitary Coral)
Rugosa (Order), often referred to as 'Horn Coral' (Lithostrotionella or Grewingkia)
sedimentary
Petoskey Stone (Fossilized Rugose Coral)
Hexagonaria percarinata (Calcium Carbonate, CaCO3)
sedimentary
Lapis Lazuli (Tumbled Stone)
Na6Ca2(Al6Si6O24)(SO4,S,Cl)2 (predominantly Lazurite)
metamorphic
Marble (White)
Metamorphosed Limestone (mainly CaCO3)
metamorphic
Painted River Rock
Anthropogenic-modified Siliciclastic Sedimentary Rock
Sedimentary
Note: The image provided is a fabric sock, not a geological specimen.
Polyester-Cotton Blend with Elastane
Synthetic/Natural Fiber (Non-Geological)
Fossilized Brachiopod
Phylum Brachiopoda (General mineral composition: Calcite/CaCO₃ or Silica/SiO₂)
sedimentary
Synthetic Costume Accessory (Non-Geological)
Polyester and Acrylic Fiber (Anthropogenic polymer)
Synthetic / Man-made textile
Slate
Foliated Metamorphic Rock
metamorphic
Sandstone Cobble
Arenite (Secondary classification based on grain size)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Amber
Succinite (specific to Baltic amber), fossilized tree resin
mineraloid
White Opal
Hydrated Amorphous Silica (SiO2·nH2O)
Mineraloid
Granite Cobble
Felsic intrusive igneous rock (composition: SiO₂ with KAlSi₃O₈, NaAlSi₃O₈, and CaAl₂Si₂O₈)
igneous
Petoskey Stone
Hexagonaria percarinata
sedimentary
Fossilized Coral (Petoskey-style)
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Chalk (Sedimentary Limestone)
Calcium Carbonate (CaCO3) - Bioclastic Limestone
sedimentary
Cardstock (Paper)
Cellulose (C6H10O5)n
sedimentary (man-made)
Garnet in Schist (Polished Tower)
Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist
metamorphic
Chalk
Calcium Carbonate (CaCO3)
sedimentary
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Lapis Lazuli
Lazurite-dominated metamorphic rock ((Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)
metamorphic
Granite (with Quartz and Mica)
Phaneritic Felsic Igneous Rock
igneous
Bituminous Coal
Organic-rich sedimentary rock (Complex hydrocarbons)
sedimentary
Synthetic Resin / Plastic Figurine
Synthetic Polymer (Copolymer of Polyethylene or Resin)
Mineraloid-like Synthetic Material