Mineral, Often Found In Metamorphic Rocks But Also In Sedimentary And Igneous Rocks

Browse mineral, often found in metamorphic rocks but also in sedimentary and igneous rocks specimens identified by the Rock Identifier community.

Greenstone

Greenschist / Greenstone (Chlorite-Epidote facies)

metamorphic

Rough Precious Opal

Hydrated Silica (SiO2·nH2O)

mineral

Turquoise

CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)

mineral

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

metamorphic

Quartz Pebble

Silicon Dioxide (SiO2)

Mineral / Sedimentary

Hematite

Iron(III) oxide (Fe2O3)

mineral

Sandstone (with potential mineral inclusions)

Clastic sedimentary rock (primarily Quartz, SiO2)

sedimentary

Rhodonite

Manganese silicate (Mn,Fe,Mg,Ca)SiO3

mineral

Limestone

Calcium Carbonate (CaCO3)

sedimentary

Banded Agate (Jasper-Agate)

Silicon Dioxide (SiO₂)

Mineral

Blue Chalcedony

Chalcedony (SiO2)

mineral

Amazonite

K(AlSi3O8) - Microcline variant

mineral

Limestone Pebble

Sedimentary Calcium Carbonate (CaCO3)

sedimentary

Milky Quartz

Silicon Dioxide (SiO2)

mineral

Citrine

Quartz (SiO2) - variety Citrine

Mineral

Milky Quartz

Silicon Dioxide (SiO2)

mineral

Hematite

Iron(III) oxide (Fe2O3)

mineral

Olivine

Olivine group (Mg, Fe)2SiO4

mineral

Quartzite

Quartzite (primarily SiO2)

metamorphic

Rough Dark Green Sapphire

Corundum (Al2O3)

mineral

Amethyst (Variety of Quartz)

Silicon Dioxide (SiO2)

mineral

Grey Agate (Banded Chalcedony)

Agate (Silicon Dioxide - SiO2)

mineral

Garnet Schist

Garnetiferous Micaceous Schist

metamorphic

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