Moonstone
Orthoclase Feldspar ((K,Na)AlSi3O8)
mineral
Category
Sedimentary Or Metamorphic (Low Grade)
Browse sedimentary or metamorphic (low grade) specimens identified by the Rock Identifier community.
Sulfur
Native Sulfur (S8)
mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Yellow Chalcedony
Chalcedony (a cryptocrystalline variety of Quartz, SiO₂)
Mineral
Amethyst
Quartz (SiO2) variety
Mineral
Yellow Quartzite (Tumbled)
Quartzite (SiO2)
metamorphic
Porcelain (White Ceramic)
Mullite-bearing Vitrified Ceramic (Major phases: Mullite Al6Si2O13, Glassy Silica SiO2)
metamorphic
Pyrite
Iron Disulfide (FeS2)
mineral
Chalcedony
Silicon dioxide (SiO2) - Microcrystalline quartz
mineral
Yellow Quartz (Citrine or Iron-Stained Quartz)
Silicon Dioxide (SiO2)
mineral
Labradorite
Labradorite (Plagioclase Feldspar Series - (Ca, Na)(Al, Si)4O8)
mineral
Ferruginous Sandstone (River Pebble)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 cement)
sedimentary
Tufa
Calcareous Tufa (CaCO3)
sedimentary
Limestone
Sedimentary Calcite (CaCO3)
sedimentary
Sodalite
Sodalite, Na8(Al6Si6O24)Cl2
Mineral
White Marble
Recrystallized Calcite / Calcium Carbonate (CaCO3)
metamorphic
Labradorite
Labradorite (a calcium-enriched feldspar mineral), (Ca, Na)(Al, Si)4O8
mineral
Quartz Druze on Matrix
Silicon Dioxide (SiO2)
mineral
Peach Moonstone
Orthoclase Feldspar (KAlSi3O8)
mineral
Lazulite
Lazulite (MgAl2(PO4)2(OH)2)
mineral
Blue Sapphire
Corundum (Al2O3)
mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Anthracite Coal
Anthracite (Carbon)
sedimentary
Blue Sapphire
Corundum (Al2O3 with trace Titanium and Iron)
mineral
Chalcedony (Common Opal/Chert variety)
Silicon Dioxide (SiO2)
mineral
Exposed Aggregate Concrete (Pea Gravel)
Concrete with Siliceous Alluvial Gravels
sedimentary (man-made conglomerate)
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
mineral
Lapis Lazuli (Tumbled Stone)
Na6Ca2(Al6Si6O24)(SO4,S,Cl)2 (predominantly Lazurite)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Marble (Carrara Marble style)
Recrystallized Calcite (CaCO3)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Unakite (Epidotized Granite)
Epidotized Granite
metamorphic
Blue Quartzite
Quartzite with inclusions (SiO2)
metamorphic
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Pink Granite / Gneiss
Felsic Plutonic Rock (Granite) with Gneissic banding
igneous / metamorphic
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
mineral
Ocean Jasper (Orbicular Jasper)
Spherulitic Chalcedony (SiO2)
sedimentary