Green Fluorite
Calcium Fluoride (CaF2)
mineral
Category
Mineraloid (Man Made Origin)
Browse mineraloid (man made origin) specimens identified by the Rock Identifier community.
Quartz
Silicon Dioxide (SiO2)
mineral
Picture Jasper
Silicon Dioxide (SiO2) with iron oxide and clay impurities
sedimentary
Chert (specifically Yellow or River Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Granite Pebble (River Rock)
Phaneritic Felsic Igneous Rock
igneous
Jasper
Silicon Dioxide (SiO2) - a variety of Chalcedony (Cryptocrystalline Quartz)
Mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Red Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Milky Quartz with Chlorite inclusion
Silicon Dioxide (SiO2) with Chlorite group inclusions
mineral
Amber
Succinite (Formula: C10H16O)
mineral
Banded Calcite (often sold as 'Mexican Onyx' or 'Green Onyx')
Calcite (Calcium Carbonate, CaCO3)
sedimentary
Chert (Flint Pebble)
Silicon Dioxide (SiO2)
sedimentary
Limestone (specifically Grainstone or Micrite)
Calcium Carbonate (CaCO3)
sedimentary
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Obsidian
Obsidian (Volcanic glass, primarily SiO2)
igneous
Chalcedony (specifically Agate or Moonstone-like Quartz)
Silicon Dioxide (SiO2)
mineral
Obsidian
Obsidian (Volcanic Glass, SiO2 > 70%)
igneous
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Pink Feldspar
Orthoclase (KAlSi3O8) or Microcline
mineral
Chert (Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Greenstone
Metamorphosed Mafic Igneous Rock
metamorphic
Chalcedony
Chalcedony (SiO2)
mineral
Banded Gneiss
Gneiss (pronounced "nice")
Metamorphic Rock
Red Jasper (with Hematite inclusions)
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)
sedimentary
Petrified Wood
Silicified Wood (primarily Silicon Dioxide, SiO2)
mineral
Picture Jasper
Silicon Dioxide (SiO2) with iron oxide and mineral impurities
sedimentary
Quartzite Pebble
Quartzite (predominantly Silicon Dioxide - SiO2)
metamorphic
Jasper (Green)
Silicon dioxide (SiO2)
Mineral/Sedimentary
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Native Copper
Native Copper (Cu)
mineral
Citrine
Silicon dioxide (SiO2)
mineral
Diamond (in jewelry)
Diamond (Carbon, C)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Jasper Agate
Chalcedony (Silicon Dioxide - SiO2)
mineral
Quartz (Chert/Chalcedony Variety)
Silicon Dioxide (SiO2)
mineral
Iron Slag
Ferrous Slag (complex silicate and oxide byproduct)
industrial byproduct (anthropogenic)
Gneiss
Gneissic Metamorphic Rock
metamorphic
Aquamarine
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Coquina / Fossiliferous Limestone
Fossiliferous Calcarenite (Calcium carbonate, CaCO3)
sedimentary