Agate / Banded Chalcedony
Agate (Silicon Dioxide / SiO2)
mineral
Category
Industrial Byproduct (Anthropogenic Rock)
Browse industrial byproduct (anthropogenic rock) specimens identified by the Rock Identifier community.
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Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Garnet
Garnet Group (formula varies, e.g., Almasndine: Fe3Al2(SiO4)3)
mineral
Schist
Mica Schist
metamorphic
Schist
Mica Schist
metamorphic
Tektite (Indochinite)
Tektite (Silica-rich natural glass)
mineral
Granitic Pegmatite with Schorl Tourmaline
Granitic Pegmatite (Schorl: NaFe3Al6(BO3)3Si6O18(OH)4)
igneous
Garnet Schist
Almandine-Mica Schist
metamorphic
Bull Quartz (Milky Quartz)
Quartz (Silicon Dioxide - SiO2)
mineral
Gold-bearing Quartz
Native Gold (Au) in Quartz (SiO2) matrix
mineral
Quartz with Mica inclusions (likely Iron-stained)
Silicon Dioxide (SiO2) with Phyllosilicates
mineral
Moqui Marble
Iron Oxide Concretion
sedimentary
Banded Agate
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
Mineral / Sedimentary component
Quartzite
Quartzite (High-purity SiO2)
metamorphic
Quartz on Chlorite Schist
Chlorite Schist (Mg,Fe)3(Si,Al)4O10(OH)2 with Quartz (SiO2)
metamorphic
Gold and Diamond
Native Gold (Au) and Diamond (C)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Bort or Carbonado
C - Polycrystalline Diamond
mineral
Diamond (Round Brilliant Cut)
Diamond (Pure Carbon, C)
mineral
Chert / Jasper
Silicon Dioxide (SiO2)
sedimentary
Diamond
Natural Diamond (Carbon, C)
mineral
Diamond
Natural Diamond (Carbon, C)
mineral
Diamond (set in jewelry)
Carbon (C)
mineral
Schist
Mica Schist
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
Mineral
Black Sapphire (Basaltic Blue Sapphire)
Corundum (Al2O3)
mineral
Anthracite Coal
Anthracite
sedimentary
Kimberlite
Kimberlite (Group I or II)
igneous
Yellow Quartzite (River Pebble)
Quartzite (primarily SiO2)
metamorphic
Biotite Schist (with Garnet and Pyrite)
K(Mg,Fe)3AlSi3O10(OH,F)2 (Biotite focus)
metamorphic
Milky Quartz Mushroom Carving
Quartz (Silicon Dioxide, SiO2)
mineral
White Sapphire
Corundum (Al2O3)
mineral
Diamond
C (Carbon)
mineral
Quartzite (Gold/Tan River Cobble)
Quartzite (composed primarily of crystalline SiO2)
metamorphic
Diamond (in Jewelry)
Carbon (C)
mineral
Ruby (Corundum)
Aluminum Oxide (Al2O3) with Chromium traces
mineral
Red Sandstone
Arenite (with Iron Oxide pigmentation)
Sedimentary
Bornite (Peacock Ore)
Bornite (Copper iron sulfide - Cu5FeS4)
mineral
Cubic Zirconia (in Jewelry)
Zirconium Dioxide (ZrO2)
mineral
Anthracite Coal
Anthracite (Carbon)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary