Asphalt Concrete (Bituminous Concrete)
Bituminous aggregate
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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Sandstone (with potential trace fossils)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Banded Calcite (Onyx Marble)
Calcite (CaCO3) / Travertine
sedimentary
Copper Ore
Native Copper (Cu) often found with Chalcocite (Cu2S) or Bornite (Cu5FeS4)
mineral
Unknown metallic sulfide-bearing rock, possibly chalcopyrite or bornite
Tentative: chalcopyrite (CuFeS₂) or bornite (Cu₅FeS₄)
mineral
Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Native Copper
Native Copper (Cu)
mineral
Coal (Anthracite / Bituminous)
Organic Sedimentary Rock (Carbon-based)
sedimentary
Chert (specifically Flint Arrowhead)
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Sandstone (Quartz Sandstone / Iron-stained Sandstone)
Sandstone (SiO2 with iron oxide impurities)
sedimentary
Rose Quartz
Quartz (Silicon Dioxide - SiO2) with trace amounts of titanium, iron, or manganese
mineral
Cubic Zirconia (Man-made)
Cubic Zirconia (ZrO2) with Enamel and Metal Alloy
mineral
Chrysocolla in Matrix
Hydrated copper phyllosilicate mineral (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Vanadinite
Lead Chlorovanadate - Pb5(VO4)3Cl
mineral
Milky Quartz with Hematite inclusions
Silicon Dioxide (SiO2)
mineral
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Orange Quartzite / Carnelian Agate
Silicon Dioxide (SiO2)
metamorphic
Likely weathered native copper-bearing rock
Unidentified copper-bearing specimen; native copper (Cu) is possible but cannot be confirmed visually
mineral
Iron Meteorite (likely Chondrite or weathered Iron-Nickel)
Meteorite (Fe-Ni alloy & silicates)
igneous
Granite
Granite (Phaneritic Igneous Rock)
igneous
Blue Sapphire (in a faceted jewelry setting)
Corundum (Al2O3) with trace Iron and Titanium
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Slag
Anthropogenic Vitreous Silicate / Ferro-silicate Slag
igneous
Sandstone
Arenite (SiO2 based clastic rock)
sedimentary
Gold
Native Gold (Au)
mineral
Gold Nugget
Gold (Au)
mineral
Gold
Gold (Au)
mineral
Rose Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Green Moss Agate
Agate (Silicon Dioxide, SiO2) with inclusions
mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone with Secondary Mineral Encrustation
Arenite with Silica/Calcite deposits (SiO2 or CaCO3)
sedimentary
Tree Agate
Silicon Dioxide (SiO2) with Dendritic Inclusions
Mineral
Quartzite (Aventurine type)
Metamorphosed Quartz Sandstone (SiO2 with inclusions)
metamorphic
Conglomerate
Conglomerate
sedimentary
Sandstone Beach Pebble
Clastic sedimentary rock (SiO2 with iron oxide cement)
sedimentary
Iron Meteorite
Siderite (meteoritic iron, Fe-Ni alloy)
mineral
Scoria (vesicular volcanic rock)
Scoria; basaltic to andesitic volcanic rock, chiefly plagioclase, pyroxene, and volcanic glass
igneous
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Slag
Metallurgical by-product
Anthropogenic (Man-made material)
Rose Quartz
Silicon Dioxide (SiO2) with trace Titanium, Manganese, or Iron
mineral