Yellow Chalcedony (likely Carnelian or Agate)
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.
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Milky Quartz
Silicon Dioxide (SiO2)
mineral
Banded Agate (Onyx variant)
Silicon dioxide (SiO2)
sedimentary
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Native Gold
Native Gold (Au)
mineral
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
White Agate (Chalcedony)
Chalcedony (SiO2)
mineral
Carnelian
Carnelian (Cryptocrystalline variety of Quartz, SiO2)
mineral
Greenstone with Epidote or Quartz veins
Metabasalt (Greenstone facies)
metamorphic
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Citrine
Silicon Dioxide (SiO2)
mineral
Gneiss (specifically Banded Gneiss)
Gneiss
metamorphic
Agate
Silicon Dioxide (SiO2)
mineral
Banded Calcite (often sold as Mexican Onyx)
Calcium Carbonate (CaCO3)
mineral
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Rough Garnet (Almandine)
Almandine Garnet (Fe3Al2(SiO4)3)
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Calcite crystal cluster
Calcite (calcium carbonate, CaCO₃), likely honey or pale-orange calcite
mineral
Quartzite Pebble
Quartzite (primarily Silicon Dioxide, SiO2)
metamorphic
Clear Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
gemstone
Chalcopyrite (Peacock Ore)
Chalcopyrite (CuFeS2) with Bornite (Cu5FeS4) oxidation
mineral
Labradorite
(Ca,Na)(Al,Si)4O8
mineral
Carborundum (Silicon Carbide)
Silicon carbide (SiC)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Agate (Slab)
Agate (Cryptocrystalline variety of Quartz, SiO2)
Mineral
Rose Quartz
Silicon dioxide (SiO2) with traces of titanium, iron, or manganese
mineral
Greenstone
Metabasalt (Greenstone)
metamorphic
Gneiss
Gneiss
metamorphic
Blue magnesite beads
Magnesite (MgCO₃), likely stabilized or dyed; brown veining may reflect matrix or iron oxides
mineral
Quartz Vein Rock
Silicon Dioxide (SiO2)
Mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz (Smoky Quartz variant)
Silicon Dioxide (SiO2)
mineral
Red jasper pebble
Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic