Clear Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Category
Igneous Or Sedimentary (Anthropogenic Modification)
Browse igneous or sedimentary (anthropogenic modification) specimens identified by the Rock Identifier community.
Graphite
Graphite (Native Carbon), Formula: C
Metamorphic
Hematite
Iron(III) oxide (Fe2O3)
mineral
Gneiss
Gneiss (Metamorphic rock composed primarily of quartz, feldspar, and mica)
metamorphic
Pyrite (Iron Pyrites)
Iron Sulfide (FeS2)
mineral
Optical Calcite (Iceland Spar)
Calcite (Calcium Carbonate, CaCO3)
mineral
Quartz (Milky or White Quartz)
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Quartz (Milky Quartz / Quartzite)
Silicon Dioxide (SiO2)
mineral
Yellow Quartz (Citrine/Yellow Jasper mix)
Silicon Dioxide (SiO2)
mineral
Orthoclase Feldspar
Potassium aluminum silicate (KAlSi3O8)
mineral
Quartz (Milky/Iron-stained)
Silicon Dioxide (SiO2)
mineral
Pumice or Tufa/Travertine
Pumice (if igneous) or Calcareous Tufa (if sedimentary)
igneous/sedimentary
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Quartz (Milky or White Quartz)
Silicon Dioxide (SiO2)
mineral
Native Gold
Native Gold (Au)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Yellow Chalcedony (common opal or chert variant)
Silicon Dioxide (SiO2)
sedimentary (mineraloid/microcrystalline quartz)
Quartz / Clear Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Blue Chalcedony
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Red Garnet
Almandine Garnet (Fe3Al2(SiO4)3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky or Common Quartz)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Schist
Chlorite/Mica Schist
metamorphic
Granitic Gneiss
Gneiss (containing Potassium Feldspar and Quartz)
metamorphic
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Gneiss (Granitic Gneiss)
Gneiss (composed primarily of Quartz, Feldspar, and Mica/Amphibole)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Optical Calcite (Iceland Spar)
Calcite (Calcium Carbonate, CaCO3)
mineral
Quartz (Common or Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral