White Agate (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Category
Industrial By Product
Browse industrial by product specimens identified by the Rock Identifier community.
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Serpentinite
Serpentinite (containing minerals of the Serpentine subgroup: Antigorite, Lizardite, and Chrysotile; formula (Mg,Fe)3Si2O5(OH)4)
metamorphic
Yooperlite
Fluorescent Sodalite-bearing Syenite
igneous
Quartzite
Quartzite (SiO2)
metamorphic
Peridot (Gem-quality Olivine)
Magnesium Iron Silicate ((Mg, Fe)2SiO4)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Olivine (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Calcite Geode
Calcium Carbonate (CaCO3)
mineral
Chert (Flint/Jasper)
Silicon Dioxide (SiO2)
sedimentary
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Diamond
Diamond (pure Carbon, C)
mineral
Amethyst (Purple), Sulfur (Yellow), and Blue Apatite
SiO2 (Quartz), S (Native Sulfur), Ca5(PO4)3(F,Cl,OH) (Apatite Group)
mineral
Silicon Carbide (Carborundum)
Silicon Carbide (SiC) / Moissanite (natural)
mineral
Chert (Jasper/Flint variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Greywacke
Lithic Sandstone (Greywacke)
sedimentary
White Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
mineral
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Bauxite
Bauxite (Al(OH)3 mixed with Fe2O3 and clay minerals)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Bauxite
Bauxite (Al(OH)3, AlO(OH))
sedimentary
Banded Iron Formation (BIF)
Magnetite-Hematite Chert (Banded Iron Formation)
sedimentary
Nephrite Jade
Ca2(Mg, Fe)5Si8O22(OH)2
metamorphic
Granodiorite (containing Biotite and Quartz)
Granodiorite (Plagioclase-rich phaneritic intrusive rock)
igneous
Basalt (Road Aggregate / Crushed Stone)
Aphanitic Mafic Igneous Rock
igneous
Andesite
Intermediate Volcanic Rock (Andesite)
igneous
Basalt
Extrusive Igneous Basalt (contains Plagioclase Feldspar and Pyroxene)
igneous
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Pink Quartzite
Quartzite (primarily SiO2 with trace impurities of iron oxides)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Basalt
Aphanitic Mafic Igneous Rock
igneous
River Stone (Quartzite)
Metamorphic Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic