Metamorphic Rock (For Nephrite And Some Jadeite); Mineral (For Jadeite)

Browse metamorphic rock (for nephrite and some jadeite); mineral (for jadeite) specimens identified by the Rock Identifier community.

Sandstone (Ferruginous)

Clastic Sedimentary Rock (SiO2 with Fe2O3/FeOOH cement)

sedimentary

Galena

Lead Sulfide (PbS)

mineral

Granite

Phaneritic Felsic Intrusive Igneous Rock

igneous

Hypersthene

(Mg,Fe)SiO3 - Enstatite-Ferrosilite series

mineral

Green Quartzite (Aventurine-like)

Quartzite (primarily SiO2 with trace Fuchsite mica inclusions)

metamorphic

Quartz Geode

Silicon Dioxide (SiO2) in Geode form

sedimentary

Green Apophyllite and Stilbite on Quartz Cluster

Apophyllite-(K) (KCa4(Si8O20)(F,OH)·8H2O), Stilbite-Ca (NaCa4(Si27Al9)O72·28H2O), Quartz (SiO2)

Mineral

Arsenopyrite in Quartz Matrix

Arsenopyrite (FeAsS) with Quartz (SiO2)

Mineral in a Metamorphic/Hydrothermal rock

Unakite

Epidotized Granite

Igneous rock

Serpentinite (Serpentine Rock)

Serpentinite is a rock composed of one or more serpentine group minerals, chiefly antigorite, chrysotile, and lizardite, with the general formula (Mg,Fe)3Si2O5(OH)4. Often includes other minerals like magnetite, talc, and chromite.

Metamorphic Rock

Conglomerate

Conglomerate (Detrital sedimentary rock)

sedimentary

Shale or Argillite

Shale (fine-grained clastic sedimentary rock) or Argillite (low-grade metamorphic rock derived from shale)

Sedimentary or Metamorphic (low grade)

Greenstone

Greenschist (commonly containing Chlorite, Actinolite, and Epidote)

metamorphic

Sunstone

Oligoclase or Andesine (Plagioclase Feldspar) - (Ca, Na)((Al, Si)2Si2O8)

mineral

Biotite Schist

Metamorphic

Smoky Quartz

Silicon Dioxide (SiO2)

mineral

Agate

Silicon Dioxide (SiO2) - variety of Chalcedony

mineral

Schist (Kyanite Schist)

Kyanite-Mica Schist (primarily Al2SiO5, KAl2(AlSi3O10)(OH)2, and SiO2)

metamorphic

Agate

Agate (Silicon Dioxide - SiO2)

mineral

Smoky Quartz

Silicon Dioxide (SiO2)

mineral

Amazonite

Amazonite (KAlSi3O8) - a variety of Microcline Feldspar

Mineral

Emerald

Beryl (Be₃Al₂Si₆O₁₈), specifically the green variety colored by trace amounts of chromium or vanadium.

Mineral

Red Sandstone

Sandstone (mainly SiO2 with Iron Oxide cement)

sedimentary

Magnetite

Magnetite (Fe3O4)

Mineral

Magnetite

Magnetite (Fe3O4)

Mineral

Garnet (likely Almandine, Pyrope, or a blend)

Garnet group minerals: X3Y2(SiO4)3, where X and Y represent various metal ions (e.g., Almandine: Fe3Al2(SiO4)3, Pyrope: Mg3Al2(SiO4)3)

Mineral

Red Jasper

Silicon dioxide (SiO2) with iron oxide (Fe2O3) inclusions

sedimentary/mineral

Banded Gneiss

Gneiss (Metamorphic Rock)

metamorphic

Epidote

{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)

mineral

Sandstone Concretion

Sandstone (Sedimentary Rock) with silica or calcite cement

sedimentary

Sandstone Concretion

Clastic sedimentary rock (primarily Quartz SiO2)

sedimentary

Chert (concretionary/nodular variant)

Microcrystalline Quartz (SiO2) with possible fossil or mineral inclusions

sedimentary

Sandstone

Arenite (composed primarily of SiO2)

sedimentary

Ruby

Corundum (Al2O3:Cr)

mineral

Sandstone Concretion

Clastic sedimentary rock (primarily Silica, SiO2, or Calcium Carbonate, CaCO3)

sedimentary

Sulfur (in host rock)

Native Sulfur (S8)

mineral

Magnetite (Iron Ore)

Magnetite (Fe3O4)

mineral

Labradorite (Feldspar)

Labradorite: (Ca,Na)(Al,Si)4O8

mineral

Gneiss

High-grade regional metamorphic rock (Foliated)

metamorphic

Chert (Chalcedony/Agate variety)

Silicon Dioxide (SiO2)

sedimentary

Muscovite Mica

Muscovite: KAl2(AlSi3O10)(OH)2

mineral

Black Tourmaline (Schorl)

Schorl (Na(Fe^2+)3Al6(Si6O18)(BO3)3)(OH)3(OH))

mineral