Basalt
Basalt (Aphanitic Mafic Volcanic)
igneous
Category
Industrial Byproduct
Browse industrial byproduct specimens identified by the Rock Identifier community.
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Quartzite Pebbles
Quartzite (SiO2)
metamorphic
Quartzite (River Cobble)
Quartzite (SiO2)
metamorphic
Rose Quartz
Silicon Dioxide with trace inclusions (SiO2)
mineral
Schist with Garnet inclusions
Garnet-mica-schist
metamorphic
Anthracite Coal
Anthracite
metamorphic
Blue Sapphire
Corundum (Al2O3)
mineral
Ruby (set in a gold pendant)
Ruby (Variety of Corundum, Al2O3)
mineral
Milky Quartz (Gold-bearing Prospecting Specimen)
Silicon Dioxide (SiO2)
mineral
Diamond (faceted)
Diamond (Pure Carbon, C)
mineral
Schorl (Black Tourmaline)
Sodium Iron Aluminum Borosilicate Hydroxide; NaFe2+3Al6Si6O18(BO3)3(OH)3OH
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Aragonite Star Cluster
Aragonite (Calcium Carbonate, CaCO3)
mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Banded Agate (Gray Agate)
Silicon Dioxide (SiO2) - Chalcedony
mineral
Olivine (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4
Mineral
Red Quartzite
Quartzite (SiO2)
metamorphic
Raw Diamond
Diamond (pure Carbon, C)
mineral
Diamond (Cut jewelry specimen)
Diamond (pure Carbon, C)
mineral
Bauxite
Alumina-rich rock (consisting of Gibbsite, Boehmite, and Diaspore)
sedimentary
Laterite
Laterite (Iron and aluminum-rich residual rock)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Nickel
Nickel (Ni)
mineral
Rough Diamond
Diamond (pure Carbon, C)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Carnelian / Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Vesicular Basalt with Zeolite
Mafic volcanic rock with Hydrated Aluminosilicate minerals (Zeolite group)
igneous
Banded Agate
Cryptocrystalline Quartz (SiO2)
mineral
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide impurities), SiO2
sedimentary
Agate
Silicon Dioxide (SiO2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Almandine Garnet
Fe3Al2(SiO4)3
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Kyanite (Blue and Green varieties)
Kyanite (Al₂SiO₅)
mineral
Diamond
Carbon (C)
mineral
Yellow Sapphire
Corundum (Al2O3)
mineral
Aragonite Star Cluster
Aragonite (Calcium Carbonate - CaCO3)
mineral
Chert (Arrowhead Preform)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz Cobble
Silicon Dioxide (SiO2)
mineral