Diorite
Intermediate plutonic igneous rock
igneous
Category
Anthropogenic (Man Made Material)
Browse anthropogenic (man made material) specimens identified by the Rock Identifier community.
Sea Shell (Fighting Conch Fragment)
Calcium Carbonate (CaCO3) - Strombus alatus fragment
sedimentary (biogenic)
Granite
Granite (Felsic Plutonic Rock)
igneous
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary (fossilized)
Chrysocolla in Malachite
Cu2CO3(OH)2 (Malachite) / Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla)
mineral
Aragonite (specifically Mexican Marbled Onyx)
Aragonite (Calcium Carbonate, CaCO3)
mineral
Obsidian (Black)
Obsidian (High-silica volcanic glass)
igneous
Chert (or Flint)
Chert (cryptocrystalline quartz), SiO2
Sedimentary
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Granite Pebble
Felsic intrusive igneous rock
igneous
Diorite (River Pebble)
Intermediate plutonic igneous rock
igneous
Fossilized Coral (Petoskey-style)
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Diamond Plate (Steel)
Alloyed Carbon Steel or Aluminum with 'Durbar' pattern
not a rock (Man-made industrial metal)
Blue Goldstone
Aventurine Glass (Silicon Dioxide with metal inclusions)
man-made glass mineral simulant
Green Aura Quartz (Titanium treated Kyanite or Quartz)
Silicon Dioxide (SiO2) or Aluminum Silicate (Al2SiO5) with Titanium/Metal Oxide coating
mineral (man-made aura treatment)
Bismuth Crystal
Bismuth (Bi)
mineral
Granite
Granitoid (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8 + SiO2)
igneous
Pearl
Aragonite (CaCO3 with conchiolin)
mineral
Red Chert (Jasper)
Cryptocrystalline Quartz (SiO2) with iron oxide inclusions
sedimentary
Flint (or Chert)
Cryptocrystalline Quartz (SiO2)
sedimentary
Desert Rose (Baryte or Gypsum Rose)
Baryte (BaSO4) or Gypsum (CaSO4·2H2O)
mineral
Quartzite (River Pebble)
Quartzite (Mainly SiO2)
metamorphic
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Granite
Granite (a phaneritic intrusive igneous rock consisting mainly of quartz, alkali feldspar, and plagioclase)
igneous
Gold
Native Gold (Au)
mineral
Dyed Quartz (imitating Emerald/Green Quartz)
Silicon Dioxide (SiO2) with artificial pigment
mineral
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities
mineral
Dolerite (Diabase)
Dolerite / Diabase
igneous
Amazonite
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Quartz
Silicon Dioxide (SiO₂)
Mineral
Amethyst
Silicon Dioxide (SiO2) with Fe3+ impurities
mineral
Malachite
Malachite (Copper Carbonate Hydroxide) - Cu2CO3(OH)2
Mineral
Chert (Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Pyrulite (Pyrite / Chalcopyrite)
Iron Sulfide (FeS2) or Copper Iron Sulfide (CuFeS2)
mineral
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Yooperlite (Syenite clast containing fluorescent Sodalite)
Sodalite-bearing Syenite
igneous
Glazed Ceramic Tile
Fused Silicate-Clay composite
Synthetic (Man-made material mimicking natural stone)
Chert (Quartz Variety)
Chert (Silicon Dioxide, SiO2)
sedimentary
Synthetic Blue Aura Quartz
Silicon Dioxide (SiO2) with Metallic Infusion
mineral (synthetic/man-made coating)
Slag Glass (Cullet)
Amorphous Silica / Glass residue
Man-made byproduct (Non-geological)
Blue Goldstone
Aventurine Glass
Man-made mineral simulant (Glass)
Synthetic Costume Glove (Paws)
Polyethylene terephthalate (Polyester) & Polyurethane blend
Non-geological / Man-made textile