Native Copper
Native Copper (Cu)
mineral
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
View all →
Pallasite Meteorite
Pallasite (ST-class)
mineral
Sandstone
Arenite (SiO2 based with mineral cements)
sedimentary
Sandstone
Arenite (SiO2 based with mineral cement)
sedimentary
Sandstone
Arenite (mostly Quartz-based)
sedimentary
Dinosaur Fossil (Tyrannosaurus rex skull replica/specimen)
Tyrannosaurus rex (fossilized in permineralized sedimentary matrix)
sedimentary
River Pebble
Quartzite / Weathered Sedimentary Rock
sedimentary
Weathered quartz-rich pebble
Likely quartz-bearing vein rock; exact identification requires testing
mineral
Gold Nugget Jewelry
Native Gold (Au)
mineral
Iron Meteorite
Iron-Nickel Alloy (Kamacite and Taenite)
mineral
Pebble
Lithified clastic rock fragment / Quartz-rich pebble
sedimentary
Asphalt Concrete
Bituminous Concrete
sedimentary (artificial)
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Silver (Morgan Dollar)
Native Silver (Ag) - 90% Silver, 10% Copper alloy
mineral
Chert (often called Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Painted Garden Rock (likely Granite or Limestone base)
Silicon Dioxide (SiO2) / Calcium Carbonate (CaCO3) based substrate with Acrylic/Enamel pigments
igneous or sedimentary (anthropogenic modification)
Milky Quartz
Silicon dioxide (SiO2)
mineral
Tumbled yellow jasper or chert
Microcrystalline quartz (SiO₂), likely iron-oxide-stained chalcedony/chert
mineral
Cubic Zirconia
Zirconium Dioxide (ZrO2)
mineral
Ferro-slag (Leland Blue/Slag Glass)
Anthropogenic Vitreous Silica (Industrial Slag)
igneous
N/A (This is a digital image of a bar graph)
Digital Data Visualization (Bar Chart)
This is not a rock or mineral
Quartz vein material
Quartz (SiO₂), likely milky quartz with iron-oxide staining
mineral
Sandstone (Siltstone or Fine-grained)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Dendritic sandstone
Sandstone with Manganese Oxide dendrites
sedimentary
Brecciated jasper (likely)
Silica-rich jasper/chert breccia, composed mainly of microcrystalline quartz (SiO₂)
sedimentary
Native Copper (in coinage alloy)
Copper (Cu)
mineral
Ferro-silicate Slag
Industrial Vitrified Slag (High-silica amorphous glass)
Mineral byproduct (Anthropogenic)
Sandstone Pebble
Arenite (SiO2 with minor mineral cements)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Quartz (Water-worn Pebble)
Quartz (Silicon Dioxide, SiO2)
mineral
Red Painted Rock
Artificial Coated Lithic Fragment
sedimentary
Breccia
Breccia
sedimentary
Gold ring with a dark, possibly gemstone setting
Gold alloy; the dark setting is not identifiable from the image
gemstone
Sandstone
Arenite (SiO2 based clastic rock)
sedimentary
Chert (Arrowhead Artifact)
Microcrystalline Quartz (SiO2)
sedimentary
Chert Arrowhead (Lithic Artifact)
Microcrystalline Quartz (SiO2)
sedimentary
Chert Arrowhead (Lithic Artifact)
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Quartzite Pebble
Quartzite (SiO2 based)
metamorphic
Quartzite
Quartzite (SiO2 based)
metamorphic
Quartzite Pebble
Quartzite (SiO2 based)
metamorphic
Sandstone
Arenite (SiO2 based)
sedimentary
Anthracite Coal
Anthracite (Carbon based)
metamorphic