Banded Gneiss
Gneiss
metamorphic
Category
Sedimentary Like (Industrial Composite)
Browse sedimentary like (industrial composite) specimens identified by the Rock Identifier community.
Learn about Sedimentary Like (Industrial Composite) in the encyclopedia
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Aragonite / Calcite Geode
Calcium Carbonate (CaCO3)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Garnet
Garnet Group (formula varies: e.g., Almandine Fe3Al2Si3O12 or Pyrope Mg3Al2Si3O12)
gemstone
Schist
Mica Schist
metamorphic
Pumice and Scoria
Vesicular Volcanic Ejecta (Rhyolite/Andesite/Basalt)
igneous
Diamond / Clear Quartz / Glass paste
Carbon (Diamond) / Silicon Dioxide (Quartz)
gemstone
Sandstone with Quartz Vein
Arenite with Crystalline Silica (SiO2)
sedimentary
Opalite (Man-made Glass)
Synthetic Opalised Glass
mineral
Schist (with Iron Oxide)
Mica Schist
metamorphic
Chalcanthite (Likely Synthetic/Lab-Grown)
Hydrated copper(II) sulfate (CuSO4·5H2O)
mineral
Slag
Anthropogenic Vitreous Silicate / Ferro-silicate Slag
igneous
Schist
Mica Schist
metamorphic
Red Slag Glass (Cullet)
Amorphous Silicon Dioxide (SiO2) with metallic dopants
Antropogenic (Man-made material)
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Black Tourmaline
Schorl (Sodium Iron Aluminum Borosilicate Hydroxide), NaFe3Al6(BO3)3Si6O18(OH)4
mineral
Granodiorite
Granodiorite (Na,Ca)(Al,Si)4O8
igneous
Quartzite River Stone
Quartzite (primarily SiO2)
metamorphic
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Crushed Stone / Gravel
Aggregatus saxum (variable mineral composition)
sedimentary
Rounded gray river pebble, likely fine-grained sandstone or siltstone
Indeterminate clastic sedimentary rock; possibly quartz-rich sandstone or siltstone
sedimentary
Diamond
Diamond (Pure Carbon, C)
mineral
Diamond
C (Carbon)
mineral
Schist
Mica Schist
metamorphic
Carborundum (Silicon Carbide)
Silicon Carbide (SiC) / Moissanite (natural form)
mineral
Banded Agate (Tumbled)
Silicon Dioxide (SiO2)
sedimentary
Almandine Garnet
Almandine (Fe3Al2Si3O12)
mineral
Garnet Schist
Garnetiferous Mica Schist
metamorphic
Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral
Mica Schist
Mica Schist (primarily Muscovite and Biotite KAl2(AlSi3O10)(OH)2)
metamorphic
Quartz (Iron-stained or Orange Quartz)
Silicon Dioxide (SiO2)
mineral
Yellow Calcite (Banded Calcite)
Calcium Carbonate (CaCO3)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Coal (specifically Bituminous or Anthracite)
Organic sedimentary rock; primarily Carbon (C) with varying H, S, O, N
sedimentary
Conglomeratic breccia
Clast-supported polymictic conglomerate/breccia, cemented by silica- or carbonate-rich matrix
sedimentary
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Sulfur-bearing Limestone (Solfatara Specimen)
Sulfur-rich Bio-limestone (Calcium Carbonate with Native Sulfur, S8)
sedimentary
Jasper containing Agate (Jaspagate)
Silicon Dioxide (SiO2)
sedimentary
Green Jasper
Silicon Dioxide (SiO2)
sedimentary
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Rutilated Quartz
Quartz (SiO2) with Rutile (TiO2) inclusions
Mineral
Blue Sapphire (Faceted)
Corundum (Al2O3)
gemstone