Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
gemstone
Category
Metamorphic Or Sedimentary Depending On Local Grade
Browse metamorphic or sedimentary depending on local grade specimens identified by the Rock Identifier community.
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Orthoclase Feldspar
KAlSi3O8 (Potassium aluminum silicate)
mineral
Schorl (Black Tourmaline)
Sodium Iron Aluminum Borosilicate Hydroxide; NaFe2+3Al6Si6O18(BO3)3(OH)3OH
mineral
Moonstone (specifically Rainbow Moonstone / White Labradorite)
White Labradorite (Feldspar Group: (Na,Ca)(Al,Si)4O8)
mineral
Jadeite
NaAlSi2O6; Jadeite silicate mineral
metamorphic
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Moonstone
Orthoclase Feldspar ((K,Na)AlSi3O8)
mineral
Anthracite
Anthracite Coal
metamorphic
Chert (or Flint)
Chert (cryptocrystalline quartz), SiO2
Sedimentary
Geode (Unopened)
Silica-lined Vug (primarily SiO2)
sedimentary
Magnetite
Magnetite (Fe3O4)
mineral
Magnetite (Small Granule)
Magnetite (Fe3O4)
mineral
Sandstone with Trace Fossils
Arenite / Quartzwacke with Ichnofossils
sedimentary
Nephrite Jade
Ca2(Mg, Fe)5Si8O22(OH)2 (Tremolite-Actinolite series)
metamorphic
Lapis Lazuli
Lapis Lazuli (Mineral composition: Lazurite, Calcite, Sodalite, and Pyrite)
metamorphic
Marble (Carrara Marble style)
Recrystallized Calcite (CaCO3)
metamorphic
Serpentinite
Serpentinite (complex silicate minerals including Mg3Si2O5(OH)4)
metamorphic
Native Copper in Basalt
Amygdaloidal Basalt with Native Copper (Cu)
metamorphic
Unakite (Epidotized Granite)
Epidotized Granite
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
![Lapis Lazuli (Na8[Al6Si6O24]S2 (Lazurite component), a rock composed primarily of Lazurite, Calcite, and Pyrite) — metamorphic](https://media.rockidentification.com/f914c118-fe45-4316-a33a-49fa9c50cbe7-thumbnail.jpg)
Lapis Lazuli
Na8[Al6Si6O24]S2 (Lazurite component), a rock composed primarily of Lazurite, Calcite, and Pyrite
metamorphic
Serpentine
Serpentinite (composed mainly of Group Minerals Antigorite, Chrysotile, and Lizardite; Mg3Si2O5(OH)4)
metamorphic
Rough Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Blue Quartzite
Quartzite with inclusions (SiO2)
metamorphic
Ocean Jasper
Orbicular Jasper (variety of Chalcedony/Quartz, SiO2)
sedimentary
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (likely Quartzose)
Arenite (primarily SiO2)
sedimentary
Rutilated Quartz
Quartz (SiO2) with Rutile (TiO2) inclusions
Mineral
Aventurine
Aventurine Quartz (SiO2 with inclusions)
Mineral
Labradorite
Labradorite (a variety of Plagioclase Feldspar), Na(AlSi3O8) to Ca(Al2Si2O8)
Mineral
Shale or Slaty Mudstone
Argillaceous sedimentary rock
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
River Pebble (likely Quartzite or Siltstone)
Sedimentary Clast (SiO2 based)
sedimentary
Almandine Garnet
Iron aluminum silicate (Fe3Al2(SiO4)3)
mineral
Sapphire
Corundum (Al2O3)
Mineral
Blue Sapphire (Synthetic or Man-made Glass Imitation)
Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic
mineral
Gravel or Crushed Stone
Fragmented Aggregate Stone
sedimentary or igneous fragment
Orange Calcite
Calcium Carbonate (CaCO3)
mineral