Mineral Like (Anthropogenic)

Browse mineral like (anthropogenic) specimens identified by the Rock Identifier community.

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Calc-Silicate Rock

Garden Quartz

Ribbon Jasper

Sagenite Agate

Leopard Skin Jasper

Flower Jasper

Feather Jasper

Dendritic Opal

Starburst Agate

Plume Agate

Feather Agate

Moss Opal

Sunstone

Heliolite (Oligoclase or Orthoclase Feldspar), (Ca,Na)(Al,Si)4O8

mineral

Red Sandstone

Clastic Terrigenous Sedimentary Rock (composed mostly of SiO2 with Fe2O3)

sedimentary

Sandstone

Arenite (SiO2 based)

sedimentary

Peacock Ore (Bornite or Iridescent Chalcopyrite)

Bornite (Cu5FeS4) or Acid-treated Chalcopyrite (CuFeS2)

mineral

Sandstone

Arenite

sedimentary

Sandstone Pebble

Arenite (primarily SiO2)

sedimentary

Triceratops Fossil

Triceratops horridus

fossil

Granite

Intrusive Igneous Rock

igneous

Diamond

Carbon (C)

mineral

Smoky Quartz occurring with Feldspar

Silicon Dioxide (SiO2) with Potassium Aluminum Silicate (KAlSi3O8)

mineral

Chert

Microcrystalline Quartz (SiO2)

sedimentary

Clear Quartz

Silicon Dioxide (SiO2)

mineral

Biotite (Black Mica)

Biotite (K(Mg,Fe)3AlSi3O10(OH)2)

mineral

Red Feldspar (Orthoclase)

Orthoclase Feldspar (KAlSi3O8)

mineral

Blue Sapphire (Raw/Tumbled Corundum)

Corundum (Aluminum Oxide, Al2O3 with Fe/Ti traces)

mineral

Quartz Pebble

Silicon Dioxide (SiO2)

mineral

Quartz Pebble

Silicon Dioxide (SiO2)

mineral

Yellow Chalcedony (Quartz Pebble)

Silicon Dioxide (SiO2)

mineral

Quartz Pebble

Silicon Dioxide (SiO2)

mineral

Gneiss

metamorphic

Sandstone

Arenite (SiO2 primarily)

sedimentary

Sandstone

Arenite (SiO2 based)

sedimentary

Fossilized Angel Wing Shell

Cyrtopleura costata

sedimentary

Snowflake Obsidian

Volcanic Glass with Cristobalite inclusions (SiO2)

igneous

Auriferous Quartz (Gold-bearing Quartz)

Silicon Dioxide (SiO2) with trace Gold (Au) and Iron Oxides

mineral

Sugilite

Sugilite (KNa2(Fe,Mn,Al)2Li3Si12O30)

mineral

Septarian Nodule

Septarian Concretion (CaCO3 with Siderite/Limonite streaks)

sedimentary

Sandstone (Ferruginous)

Arenite (with Iron Oxides)

sedimentary

Fluorite

Calcium Fluoride (CaF2)

mineral

Sandstone

Arenite (compositionally various, primarily SiO2)

sedimentary

Siltstone Pebble with Veining

Siltstone

sedimentary

Diorite

Diorite (intermediate intrusive igneous rock)

igneous

Black Beach Pebble (Basalt / Slate Pebble)

Rounded Fine-Grained Clastic / Igneous Rock Pebble

sedimentary

Malachite

Copper carbonate hydroxide [Cu2CO3(OH)2]

mineral

Sandstone (Banded)

Sedimentary Clastic Rock

sedimentary

Basalt

Basalt (Aphanitic mafic volcanic rock)

igneous

Granite Pegmatite with Muscovite Mica

Granite Pegmatite (Silicon Dioxide and complex silicates)

igneous

Sandstone

Arenite (SiO2 based)

sedimentary

Epidote

Calcium aluminum iron silicate (Ca2(Al, Fe)3(SiO4)3(OH))

mineral

Garnet (likely Pyrope or Almandine)

Garnet Group (complex nesosilicate minerals, e.g., Pyrope Mg3Al2(SiO4)3, Almandine Fe3Al2(SiO4)3, Spessartine Mn3Al2(SiO4)3, Grossular Ca3Al2(SiO4)3, Andradite Ca3Fe2(SiO4)3, Uvarovite Ca3Cr2(SiO4)3). The vivid red color in the image strongly suggests Pyrope or Almandine.

Mineral

Chert (Jasper variety)

Chert (SiO2)

sedimentary

Sandstone (Ferruginous)

Arenite (with Iron Oxide)

sedimentary