Dragon Stone
Ohko Stone (Argillaceous sedimentary rock)
sedimentary
Category
Mineral Based Alloy (Anthropogenic)
Browse mineral based alloy (anthropogenic) specimens identified by the Rock Identifier community.
Learn about Mineral Based Alloy (Anthropogenic) in the encyclopedia
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Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Ferruginous Slag (Iron Smelting Byproduct)
Anthropogenic Vitreous Silicate (often containing Fayalite: Fe2SiO4)
Mineraloid/Anthropogenic (Technofossil)
Conglomerate
Conglomerate (Sedimentary Clastic Rock)
sedimentary
Fossilized Favosites (Honeycomb Coral)
Favosites (extinct genus of tabulate coral)
sedimentary
Fossil Coral (Rugose Coral)
Rugosa (extinct order of solitary and colonial corals)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Gastropod Fossil (Snail Internal Cast)
Class Gastropoda (Steinkern)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Volcanic Tuff (Breccia)
Pyroclastic Tuffaceous Rock
igneous
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary (fossilized)
Fossilized Coral (Petoskey-like or Favosites)
Anthozoa (Fossilized Coral)
sedimentary
Eroded Brick or Pumice-like Scoria
Vesicular Basalt / Scoria (Anthropogenic variant: Eroded Firebrick)
igneous
Fossilized Tabulate Coral
Favosites (Honeycomb Coral)
fossil
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Conglomerate
Conglomerate (Clastic sedimentary rock)
sedimentary
Favosites Fossil (Honeycomb Coral)
Favosites (Extinct genus of Tabulate Coral)
sedimentary
Textile (Upholstery Fabric)
Woven Polyethylene/Polyester or Cotton Blend
Synthetic or Natural Fiber
Fossilized Favosites (Honeycomb Coral)
Favosites (extinct genus of tabulate coral)
sedimentary
Fossil Coral
Cnidaria Anthozoa (Fossilized)
sedimentary
Ambergris
Ambrein (C30H52O Derivative)
Organic (Zoogenic)
Gold flakes
Native Gold (Au)
mineral
Anthracite Coal
Anthracite (Carbon-based metamorphic rock)
metamorphic
Anthracite Coal
Anthracite (Carbon based fossil fuel)
metamorphic
Gold
Native Gold (Au)
mineral
Banded Quartzite
Quartzite (primarily SiO2)
metamorphic
White Onyx (Marble Onyx)
Calcite (CaCO3) - Banded Calcium Carbonate
sedimentary
Picture Jasper
Silicon Dioxide (SiO2) with iron oxide and clay impurities
sedimentary
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Native Gold Nuggets
Native Gold (Au)
mineral
Zebra Jasper
Opaque microcrystalline Quartz (SiO2) with impurities
sedimentary
Banded Chert / Jasper
Silicon Dioxide (SiO2)
sedimentary
Pebble (likely Sandstone or Granitic Pebble)
Clastic Sediment (or specific rock type, e.g., Arenite, Granitoid Pebble)
Rock (likely Sedimentary)
Chert
Chert (Microcrystalline Silica, SiO2)
sedimentary
Slag (Anthropogenic Glass/Iron byproduct)
Ferro-silicate Slag
Anthropogenic (Man-made)
Amethyst
SiO2 (Silicon Dioxide)
Mineral
Man-made Jewelry (Metal and Glass/Plastic)
Synthetic Alloy and Amorphous Solid (SiO2/Polymer)
not a rock
Gold Nugget
Native Gold (Au)
mineral
Jasper Chert
Microcrystalline Quartz (SiO2) with iron oxide inclusions
sedimentary
Chert (Limestone-based)
Silicon Dioxide (SiO2) within Carbonate host
sedimentary
Porcelain (Kaolin-based)
Alumina silicate ceramic (composed primarily of Kaolinite: Al2Si2O5(OH)4)
metamorphic (man-made/engineered)
Chert (Limestone-based)
Silicon Dioxide (SiO2)
sedimentary