Banded Jasper
Silicon Dioxide (SiO2)
Mineral/Sedimentary Rock (as a cryptocrystalline variety of quartz)
Category
Mineral (Silicate Variety)
Browse mineral (silicate variety) specimens identified by the Rock Identifier community.
Green Quartzite (Aventurine variety)
Silicon Dioxide (SiO2) with inclusions of Fuchsite
metamorphic
Chert (often called Flint when dark or found in chalk)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Rose Quartz
SiO2 (Silicon Dioxide)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Rose Quartz
SiO2 (Silicon Dioxide with trace inclusions of Phosphorus, Aluminum, or Titanium)
mineral
Rose Quartz
Quartz (Silicon Dioxide - SiO2) with trace amounts of titanium, iron, or manganese
mineral
Rose Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Fluorite
Fluorite (CaF₂)
mineral
River Cobble (likely Sandstone or Siltstone type)
Sandstone or Siltstone (common rock types that form river cobbles)
Sedimentary Rock (specifically a clastic sedimentary rock formed into a cobble)
Chalcedony (specifically Agate or Carnelian variety)
Cryptocrystalline Silica (SiO2)
mineral
Amethyst
Quartz (SiO2) with trace iron impurities
Mineral
Emerald
Emerald (Beryl variety); Be3Al2(SiO3)6 with Chromium/Vanadium impurities
mineral
Sunstone
Oligoclase (a variety of Plagioclase Feldspar) - (Na,Ca)(Si,Al)4O8
mineral
Sandstone (Micaceous Sandstone)
Arenite (SiO2 with KAl2(AlSi3O10)(OH)2 inclusions)
sedimentary
Chert (Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Obsidian
Volcanic Glass (Amorphous SiO2)
igneous
Barite (Desert Rose or Cockscomb variety)
Barium Sulfate (BaSO4)
mineral
Basalt (Weathered/River worn)
Mafic Volcanic Rock (Primarily Plagioclase Feldspar and Pyroxene)
igneous
Pyrite
Pyrite (Iron sulfide, FeS₂)
mineral
Pebble (river rock/beach pebble)
Pebble (clast size class)
Sedimentary Rock
Pearl (Biogenic Mineral)
Calcium Carbonate (primarily Aragonite) with Conchiolin; CaCO3
mineral
Granite
Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Orange Aventurine (Sunstone-style Quartzite)
Silicon Dioxide (SiO2) with Goethite or Hematite inclusions
metamorphic
Granite
Granite (composed primarily of Quartz, Feldspar, and Mica)
igneous
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese
mineral
Rose Quartz
SiO2 (Silicon Dioxide)
mineral
Carnelian Agate
Silicon Dioxide with Iron Oxide impurities (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Aquamarine and clear quartz
Aquamarine (Be3Al2Si6O18), Quartz (SiO2)
Mineral
Sodalite
Sodalite, Na8(Al6Si6O24)Cl2
mineral
Sodalite
Sodalite, Na8(Al6Si6O24)Cl2
Mineral
Vesicular Basalt
Vesicular Basalt (Aphanitic Mafic Rock)
igneous
Granite
Granite (Felsic Plutonic Rock)
igneous
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
mineral
Chert (Flint variety)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Granite
Phaneritic Igneous Rock (composed of Quartz, Feldspar, and Mica)
igneous
Greenstone with Epidote or Quartz Vein
Epidiorite or Metabasalt (composed largely of Chlorite, Epidote, and Amphibole)
metamorphic
Quartz (Pebble)
Quartz (SiO₂)
Mineral
Ferruginous Sandstone
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
sedimentary
Jade (Nephrite or Jadeite)
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2 - a variety of actinolite, an amphibole mineral); Jadeite (Na(Al,Fe3+)Si2O6 - a pyroxene mineral)
Metamorphic rock (for both Nephrite and Jadeite)