Grey Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
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.
Gneiss
Gneiss
metamorphic
Gneiss
Foliated Metamorphic Rock (Gneiss)
metamorphic
Clear Quartz (Tumbled)
Quartz (Silicon Dioxide - SiO2)
mineral
Milky Quartz Cobble
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
Mineral
Gold Nugget
Native Gold (Au)
mineral
Rough Dark Green Sapphire
Corundum (Al2O3)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite (Fools Gold)
Iron Sulfide (FeS2)
mineral
Yellow Jasper
Chalcedony (SiO2) with iron oxide inclusions
mineral
Quartzite (or Milky Quartz pebble)
Quartzite (Metamorphosed Sandstone) / Silicon Dioxide (SiO2)
metamorphic
Labradorite/Larvikite
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Scoria (Lava Rock)
Vesicular Basalt / Scoria
igneous
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite with Sandstone/Iron staining
Metamorphic Quartzite (SiO2)
metamorphic
Quartzite
Metamorphic rock (primarily SiO2)
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Agate (specifically a small Chalcedony nodule)
Agate (Cryptocrystalline variety of Quartz, SiO2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Amethyst
Amethyst (variety of Quartz, SiO2)
mineral
Greenstone
Greenschist (commonly containing Chlorite, Actinolite, and Epidote)
metamorphic
Fluorite
Calcium Fluoride (CaF2)
mineral
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Kunzite (variety of Spodumene)
Lithium Aluminum Silicate (LiAlSi2O6)
mineral
Quartz / Common Agate
Silicon Dioxide (SiO2)
mineral
Mica (Muscovite)
Potassium aluminum silicate - KAl2(AlSi3O10)(OH)2
mineral
Pyrite (on a metal substrate)
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartzite
Quartzite (Primary mineral: SiO2)
metamorphic
Quartz
SiO₂ (Silicon Dioxide)
Mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral