Conglomerate
Clastic Sedimentary Rock (Conglomerate)
sedimentary
Category
Mineral Based Alloy (Anthropogenic)
Browse mineral based alloy (anthropogenic) specimens identified by the Rock Identifier community.
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Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Red Mudstone (Siltstone)
Lutite (primarily Quartz and Clay minerals with Hematite)
sedimentary
Blue Slag Glass
Man-made Silicon Dioxide (Amorphous)
Anthropogenic (Man-made)
Diamond
Carbon (C)
mineral
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Chert with Asphaltum (or Tar)
Silica (SiO2) with natural Bitumen/Asphaltum
sedimentary
Granite
Granite (a broadly defined plutonic igneous rock, often more specifically classified as quartz monzonite or granodiorite based on precise mineral percentages)
igneous
Slag (Industrial Byproduct)
Ferro-silicate glass (Slag)
Anthropogenic (Man-made industrial deposit)
Carved Mottled Greenish-Yellow Crystal/Glass Object
Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.
Man-made Object/Uncertain Mineral
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartzite
SiO2 (Crystalline Quartz)
metamorphic
Arsenopyrite in Quartz Matrix
Arsenopyrite (FeAsS) with Quartz (SiO2)
Mineral in a Metamorphic/Hydrothermal rock
Quartzite
Quartzite (SiO2)
metamorphic
Granite
Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)
igneous
Yellow Topaz (Imperial or Precious Topaz)
Al2SiO4(F,OH)2 (Aluminum Silicate Fluoride Hydroxide)
mineral
Blue Chalcedony and Picture Jasper Beads
Blue Chalcedony (SiO2), Picture Jasper (SiO2)
Mineral
United States Quarter Dollar
Cupronickel Clad Alloy (75% Copper, 25% Nickel over a 100% Copper core)
Metal / Man-made mineral-like object
Chalcopyrite
Chalcopyrite (CuFeS2)
Mineral
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Conglomerate
Conglomerate (Sedimentary rock containing rounded clasts)
sedimentary
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Schist with Quartz Vein
Mica Schist with Crystalline Quartz (SiO2)
metamorphic
Chert (Flint Pebbles)
Microcrystalline Quartz (SiO2)
sedimentary
Rutilated Quartz (or possibly Tourmalinated Quartz, White Rutile)
SiO2 with TiO2 inclusions
Mineral
Titanium Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
mineral
Engineered Quartz (Quartzite look-alike)
Silicon Dioxide (SiO2) composite
mineral-based composite
Blue Howlite (Dyed)
Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)
mineral
Ferruginous Conglomerate
Ferruginous Conglomerate (Clastic Sedimentary Rock)
sedimentary
Sedimentary Breccia
Breccia (Clastic Sedimentary Rock)
sedimentary
Granite
Granite (phaneritic felsic intrusive rock)
igneous
Quartzite Cobble
Quartzite (SiO2)
metamorphic
Basalt with Vesicles
Vesicular Basalt
Igneous
Epidote
Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)
mineral
Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Marble
Metamorphosed Limestone (principally CaCO3)
metamorphic
Conglomerate
Conglomeratic Sandstone / Polymictic Conglomerate
sedimentary
Cupronickel Coin
Copper-Nickel Alloy (typically 75% Cu, 25% Ni)
anthropic metallic specimen
Iron Meteorite (Campo del Cielo)
Iron Meteorite, Group IAB (FeNi Alloy: Kamacite and Taenite)
igneous
Pallasite Meteorite
Pallasite (Stony-iron meteorite; Fe-Ni alloy with (Mg,Fe)2SiO4 olivine)
Mineral/Extraterrestrial Rock
Grey River Pebble (Likely Quartz-rich or Limestone)
Clastic Sedimentary Rock (typically SiO2 or CaCO3 based)
sedimentary
Anthracite Coal
Anthracite (Carbon-based sedimentary-derived metamorphic rock)
metamorphic