Mineral Based Alloy (Anthropogenic)

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

Basalt

Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

igneous

Basalt

Basalt (composition of Plagioclase feldspar and Pyroxene)

igneous

Basalt with Quartz/Quartzite Veins

Aphanitic Mafic Volcanic Rock with Siliceous Infillings

igneous

Limestone (specifically a Crushed Aggregate fragment)

Calcium Carbonate (CaCO3)

sedimentary

Basalt (River Pebble)

Extrusive mafic igneous rock

igneous

Diorite (Salt and Pepper Rock)

Diorite (comprising Plagioclase Feldspar, Hornblende, and Biotite)

igneous

Granodiorite

igneous

Wishing Stone (Sandstone with Quartz Vein)

Arenite with Quartzite intrusion (SiO₂)

sedimentary

Basalt with Olivine Phenocrysts

Porphyritic Basalt (with (Mg, Fe)2SiO4)

igneous

Granodiorite (River Rock / Cobble)

Granodiorite; Phaneritic intrusive igneous rock dominated by plagioclase, quartz, and hornblende/biotite

igneous

Granodiorite

Phaneritic intrusive igneous rock (Granodiorite)

igneous

Basalt

Aphanitic mafic volcanic rock (primarily plagioclase feldspar and pyroxene)

igneous

Sandstone (Greywacke)

Clastic Sedimentary Rock (SiO2 with lithic fragments)

sedimentary

Siltstone

Siltstone (fined-grained clastic sedimentary rock)

sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

sedimentary

Porphyritic Basalt or Andesite

Porphyritic Basalt / Andesite

Igneous

Limestone (Weathered)

Calcium Carbonate (CaCO3)

sedimentary

Limestone (Fossiliferous)

Calcium Carbonate (CaCO3) - Bioclastic Limestone

sedimentary

Basalt

Basalt (Mafic Extrusive Igneous Rock)

igneous

Crushed Stone (Likely Granite or Diabase)

Intrusive Igneous Rock (Granitoid/Gabbroid)

igneous

Vesicular Basalt

Basalt (principally Plagioclase and Pyroxene)

igneous

Limestone

Calcium Carbonate (CaCO3)

sedimentary

Ferruginous Sandstone (Ironstone)

Sedimentary rock with Limonite/Goethite cement

sedimentary

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

igneous

Aquamarine

Aquamarine (Beryl variety) - Be3Al2(Si6O18)

mineral

River Rock

Sedimentary Rock (various compositions)

sedimentary

Diorite

Diorite (intermediate intrusive igneous rock)

igneous

Muscovite Schist

Mica Schist (KAl2(AlSi3O10)(OH)2)

metamorphic

Granodiorite

Granodiorite (containing Plagioclase, Quartz, and Biotite)

igneous

Quartz with Mica (likely Muscovite)

Silicon Dioxide (SiO2) with Potassium Aluminum Silicate Hydroxide Fluoride

igneous/metamorphic

Mica Schist

Mica Schist (primarily composed of Muscovite, Biotite, and Quartz)

metamorphic

Asphalt (Aggregate)

Bituminous macadam / Concrete Aggregate

sedimentary

Jade

There are two distinct minerals commonly known as Jade: Nephrite (a calcium magnesium silicate - Ca2(Mg,Fe)5Si8O22(OH)2) and Jadeite (a sodium aluminum silicate - NaAlSi2O6). Based on the image showing a typically softer, more fibrous appearance, it is likely Nephrite.

Mineral