Basalt with Quartz Vein
Basalt (SiO2 vein inclusion)
igneous
Category
Mineral Like (Anthropogenic)
Browse mineral like (anthropogenic) specimens identified by the Rock Identifier community.
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Diorite (Salt and Pepper Rock)
Phaneritic Plutonic Diorite; chemical composition roughly 52-63% silica (SiO2)
igneous
Granite Pebble
Felsic Intrusive Igneous Rock (composed of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Granite
Granite (composed primarily of Quartz SiO2 and Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8))
igneous
Banded Gneiss
Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Biotite/Amphiboles)
metamorphic
Sandstone
Arenite (CaCO3/SiO2 cemented quartz)
sedimentary
Schist (with Iron Oxide)
Mica Schist
metamorphic
Epidote with Quartz/Feldspar
Epidote (Ca2(Al, Fe)3(SiO4)3(OH)) with associated minerals in a host rock
Mineral/Metamorphic rock
Snowflake Obsidian
Volcanic Glass (spherulitic obsidian)
igneous
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Chert (Cryptocrystalline Silicon Dioxide, SiO2)
sedimentary
Bronzite
Enstatite (var. Bronzite), (Mg,Fe)SiO3
mineral
Polychrome Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Quartzite with Iron Inclusions
Metamorphosed Quartz Sandstone (SiO2 with Fe2O3)
metamorphic
Quartzite (Quartz Vein)
SiO2 (Silicon Dioxide)
metamorphic
Schist (specifically Mica Schist)
Mica Schist
metamorphic
Aventurine Quartz
Silicon Dioxide (SiO2) with inclusions (typically Fuchsite/Mica)
metamorphic
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in Rhyolitic Matrix
igneous
Obsidian
Volcanic Glass (SiO2 + impurities)
igneous
Fossilized Tiger Shark Tooth
Galeocerdo cuvier (fossilized hydroxylapatite)
sedimentary
Kaolinite Claystone
Al2Si2O5(OH)4 (Kaolinite)
sedimentary
Yellow Aventurine
Silicon Dioxide (SiO2) with inclusion of Mica
Mineral (Variety of Quartz)
Orange Quartzite / Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions
metamorphic
Fossil Shark Tooth (embedded in matrix)
Lamniformes (likely Cretalamna or Squalicorax) within phosphatic/calcareous matrix
sedimentary
Gneiss
Gneiss
metamorphic
Moqui Marble (Shaman Stone)
Iron Oxide Concretion (Hematite/Goethite-encased Sandstone)
sedimentary
Calcite in Matrix
Calcium Carbonate (CaCO3)
mineral
Botryoidal Chalcedony (Agate/Chert Nodule)
Chalcedony (SiO2)
mineral
Howlite
Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2) with Limonite/Goethite
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Ocean Jasper
Spherulitic Chalcedony (SiO2)
mineral
Jasper (Picture Jasper variety)
Silicon Dioxide (SiO2) with impurities
sedimentary
Conglomerate (River Rock Aggregate)
Conglomerate (Lithic-clast conglomerate)
sedimentary
Amber
Succinite (C10H16O)
mineraloid
Quartz with inclusions
Silicon Dioxide (SiO2)
mineral
Garnierite in Matrix
Nickel-bearing Magnesium Silicates (Garnierite)
mineral
Quartz (Smoky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary