Nuummite
Nuummite (Orthoamphibole rock composed of Anthophyllite and Gedrite)
metamorphic
Category
Sedimentary Rock (Possibly Composed Of Various Minerals)
Browse sedimentary rock (possibly composed of various minerals) specimens identified by the Rock Identifier community.
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Blue Lace Agate
Cryptocrystalline Quartz (SiO2) with trace minerals
sedimentary
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Pyrite (Iron Pyrite)
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Lapis Lazuli
Na8(Al6Si6O24)S2 (composed primarily of Lazurite, Calcite, and Pyrite)
metamorphic
Gneiss with Quartz Veining
Gneiss (High-grade regional metamorphic rock)
metamorphic
Quartzite
Quartzite (composed primarily of SiO2)
metamorphic
Chalcedony (Agate)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Carnelian
Carnelian (a variety of Chalcedony, which is a microcrystalline quartz, SiO2)
Mineral (variety of Chalcedony)
Granite
Phaneritic Felsic Igneous Rock
igneous
Gneiss (Schistose)
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Corundum
Corundum (Al2O3)
Mineral
Amphibolite (specifically Hornblende Schist/Gneiss)
Amphibole-rich Metamorphic Rock
metamorphic
Ferruginous Sandstone (Gozzan)
Iron-rich clastic sedimentary rock with Limonite/Goethite
sedimentary
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Chrome Diopside
Magnesium Calcium Silicate (MgCaSi2O6) containing Chromium impurities
mineral
Schist (Micaceous Schist)
Schist (containing mainly Muscovite and Quartz)
metamorphic
Copper-bearing Mica Schist
Mica Schist with Native Copper inclusions
metamorphic
Quartzite Pebble
Metamorphic rock predominantly composed of Quartz (SiO2)
metamorphic
Red Sandstone
Arenite (predominantly Quartz with Hematite cementation)
sedimentary
Granite
Granite (silica-rich intrusive igneous rock)
igneous
Moss Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxides
Mineral (Variety of Chalcedony)
Common Opal
Hydrated silica (SiO2 " nH2O)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 dominant)
sedimentary
Ocean Jasper
Silicon Dioxide (SiO2) with various inclusions
igneous/sedimentary mixed (Orbicular Jasper)
Mixed Gemstone Bracelet
Mixed natural minerals and rocks (e.g., Rhodonite, Malachite, Sodalite, Rose Quartz, Black Tourmaline, Quartz/Chalcedony variants)
Mineral/Rock assemblage
Marble
Metamorphosed Limestone (calcite formulation CaCO3)
metamorphic
Basalt
Mafic Volcanic Rock (composed of plagioclase, pyroxene, and olivine)
Igneous
Turquoise
Hydrated phosphate of copper and aluminum; CuAl6(PO4)4(OH)8·4H2O
mineral
Chert / Flint
Chert (varietal name for microcrystalline quartz). Chemical formula: SiO₂
Mineral
Granite (Background) and Quartzite/River Pebble (Foreground Heart)
Phaneritic Felsic Igneous Rock (Granite background)
igneous
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Sandstone
Arenite (primarily SiO2 - Silicon Dioxide)
sedimentary
Garden Quartz (Phantom Quartz)
Silicon Dioxide (SiO2) with inclusions (Chlorite, Feldspar, Goethite, Hematite)
Mineral
Red Jasper
Silicon dioxide (SiO2) with hematite impurities
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral