Mineral, Often A Rock Given Its Aggregate Nature

Browse mineral, often a rock given its aggregate nature specimens identified by the Rock Identifier community.

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

metamorphic

Granite

Granite (Felsic Intrusive Igneous Rock)

igneous

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

igneous

Gneiss

Gneiss (High-grade metamorphic rock)

metamorphic

Chert (and Flint variant)

Chert (SiO2)

sedimentary

Gneiss

Gneissic Metamorphic Rock

metamorphic

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

sedimentary

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide and mineral impurities

sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

sedimentary

Dyed Howlite (often sold as 'Turquenite')

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

mineral

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

mineral

Iron Slag

Anthropogenic Iron Silicate

industrial byproduct

Basalt

igneous

Green Jasper

Silicon dioxide (SiO2) with impurities

sedimentary

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

igneous

Granite

Granite (a phaneritic intrusive igneous rock)

igneous

Note: Item is a Synthetic/Man-made Object

Titanium-coated Stainless Steel (Fe-Cr-Ni-Ti)

Non-geological

Basalt

Basalt (Mafic Extrusive Igneous Rock)

igneous

Quartz

Quartz (SiO2 - Silicon Dioxide)

Mineral

Howlite (Dyed to resemble Turquoise)

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

mineral

Granite

Felsic Intrusive Igneous Rock (SiO2, Al2O3, K2O, Na2O)

igneous

River Siltstone / Mudstone Pebble

Siltstone (composed of mixed silicate and carbonate minerals)

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