Quartz (Iron-stained or Ferruginous Quartz)
Silicon Dioxide (SiO2)
mineral
Category
Industrial Byproduct
Browse industrial byproduct specimens identified by the Rock Identifier community.
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Garnet-Mica Schist
Schist (variety with Almandine Garnet, Fe3Al2(SiO4)3)
metamorphic
Olivine (Peridot)
Olivine Group (Magnesium Iron Silicate), (Mg, Fe)2SiO4
mineral
Chalcedony (Botryoidal)
Silicon Dioxide (SiO2)
mineral
Marble (Carrara style)
Recrystallized Calcite-rich Metamorphic Rock (CaCO3)
metamorphic
Quartzite
Quartzite (predominantly SiO2)
metamorphic
Quartz (Druzy on Matrix)
Silicon Dioxide (SiO2)
mineral
Diamond
Carbon (C)
mineral
Ruby
Corundum (Al2O3 with Chromium trace)
mineral
Diamond (in jewelry)
Cubic Carbon (C)
mineral
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone with Algae Growth
Arenite with Chlorophyta/Lichen
sedimentary
Smoky Quartz with Feldspar
Quartz (SiO2) with Potassium Feldspar (KAlSi3O8)
mineral
Diamond (set in Gold)
Carbon (C)
mineral
Rough Ruby
Corundum (Al2O3 with Chromium impurities)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Quartzite Breccia
Brecciated Quartzite (SiO2)
metamorphic
Desert Rose
Gypsum (variety Selenite) or Barite, CaSO4·2H2O
mineral
Kunzite (Spodumene)
Spodumene (LiAlSi2O6)
mineral
Rough Ruby
Corundum (Al2O3 with Chromium impurities)
mineral
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Chalcedony in Limestone Host Rock
Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)
Mineral within Sedimentary Rock
Red Sandstone
Clastic Terrigenous Sedimentary Rock (composed mostly of SiO2 with Fe2O3)
sedimentary
Shiva Lingam
Cryptocrystalline Quartz (Jasproid/Jasper)
sedimentary
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Milk Quartz (with Iron staining)
Silicon Dioxide (SiO2)
mineral
Rough Blue Diamond
Carbon (C) - Type IIb Diamond
mineral
Agate slice
Chalcedony (SiO2)
mineral
Sandstone (likely Quartzose Sandstone)
Arenite (SiO2 predominantly)
sedimentary
Quartz (Milky/Smoky variety on matrix)
Silicon Dioxide (SiO2)
mineral
Banded Agate (with possible Chalcedony layers)
Silicon dioxide (SiO2)
sedimentary
Granitic Pegmatite with Muscovite Mica
Pegmatite (containing KAl2(AlSi3O10)(OH)2)
igneous
Iron-stained Quartz
Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)
mineral
Orange Calcite
Calcite (Calcium Carbonate - CaCO3)
mineral
Diamond (or Cubic Zirconia)
Carbon (C) or Zirconium Dioxide (ZrO2)
mineral
Quartzite Cobble
Quartzite (SiO2)
metamorphic
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
mineral
Diamond (in jewelry setting)
Diamond (C - Carbon)
mineral
Granite (Phaneritic Igneous Rock)
Granite
igneous