Quartz Geode
Silicon Dioxide (SiO2)
mineral
Category
Industrial Byproduct (Often Confused With Igneous Rocks Or Meteorites)
Browse industrial byproduct (often confused with igneous rocks or meteorites) specimens identified by the Rock Identifier community.
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Sodalite
Sodalite - Na8(Al6Si6O24)Cl2
mineral
Chalcedony (Quartz Var.)
Silicon Dioxide (SiO2)
mineral
Schorl (Black Tourmaline)
Sodium Iron Aluminum Borosilicate Hydroxide; NaFe2+3Al6Si6O18(BO3)3(OH)3OH
mineral
Blue Topaz (facetted in jewelry)
Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)
mineral
Mica Group Minerals
There isn't a single scientific name as 'Mica' refers to a group of phyllosilicate minerals. Common scientific names include Muscovite (KAl₂ (AlSi₃O₁₀)(OH)₂), Biotite (K(Mg,Fe)₃AlSi₃O₁₀(OH)₂), Phlogopite (KMg₃AlSi₃O₁₀(OH)₂), and Lepidolite (K(Li,Al)₃(Al,Si,Rb)₄O₁₀(F,OH)₂).
Mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz (in matrix)
Quartz (SiO₂)
mineral
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
metamorphic
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Basalt
Basalt (Mafic volcanic rock)
igneous
Andesite
Intermediate Volcanic Rock (Andesite)
igneous
Granite
Granite (a common igneous rock)
igneous
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Serpentinite
Serpentinite (composed primarily of serpentine-group minerals like antigorite, chrysotile, and lizardite; chemical formula varies but generally Mg3Si2O5(OH)4)
Metamorphic Rock
Agate
Silicon Dioxide (SiO2) - Banded Chalcedony
mineral
Sandstone with Algae Growth
Arenite with Chlorophyta/Lichen
sedimentary
Quartz
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Agate (specifically Oco or Banded Agate)
Agate (a variety of Chalcedony), SiO2 (Silicon Dioxide)
mineral
Quartzite Pebble
Quartzite (SiO2 with minor impurities)
metamorphic
Basalt with Quartz/Calcite Veins
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Green Tourmaline
Elbaite - Na(Li1.5Al1.5)Al6Si6O18(BO3)3(OH)4
mineral
Quartzite with Quartz Vein
Metamorphosed sandstone (SiO2)
metamorphic
Quartzite River Rock
Metamorphic Quartzite (primarily SiO2)
metamorphic
Amethyst
SiO2 (Silicon Dioxide) - a variety of Quartz
Mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Chalcedony (specifically Agate or Common Opal variety)
Cryptocrystalline Silica (SiO2)
mineral
Pumice
Vesicular Rhyolite / Pumice
igneous
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Sandstone with Foliose Lichen
Arenite (Rock matrix) with Xanthoparmelia or Flavoparmelia (Lichen genus)
sedimentary
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Travertine (often colloquially called Tufa)
Chemical Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Basalt with Magnetite
Crystalline Basalt (Primarily Plagioclase and Pyroxene) with Magnetite (Fe3O4)
igneous
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral