Diamond
Carbon (C)
Category
Browse industrial byproduct (anthropogenic material) specimens identified by the Rock Identifier community.
Diamond
Carbon (C)
Angelite
Anhydrite (Calcium Sulfate, CaSO4)
Ruby (Raw Corundum)
Corundum (Aluminum Oxide with Chromium), Al2O3:Cr
Yellow Calcite
Calcium Carbonate (CaCO3)
Ruby (Corundum)
Corundum (Aluminum Oxide with Chromium), Al2O3:Cr
Green Tourmaline
Elbaite - Na(Li1.5Al1.5)Al6Si6O18(BO3)3(OH)4
Hematite
Hematite (Fe2O3)
Orange Quartz (Citrine Quartz)
Silicon Dioxide (SiO2)
Red Shale
Lutite (primarily composed of Hydrous Aluminum Silicates with Hematite staining)
Quartz (Iron-stained or Rose variant)
Silicon Dioxide (SiO2)
Agate
Silicon Dioxide (SiO2)
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
Granitic Pegmatite (Muscovite and Quartz)
Pegmatite (KAl2(AlSi3O10)(OH)2 / SiO2)
Gold-bearing Quartz
Auriferous Quartz (SiO2 with Native Gold inclusion)
Diamond in Gold Setting
Diamond (C - pure carbon)
Mica Schist
Mica Schist
Blue Calcite
Calcium Carbonate (CaCO3)
Ferruginous Quartz (River Pebble)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Basalt
Basalt (containing Pyroxene, Plagioclase feldspar, and Olivine)
Quartzite
Quartzite (primarily SiO2)
Citrine Quartz
Crystalline Quartz (SiO2 with iron impurities)
Banded Chert (Flint/Jasper variety)
Microcrystalline Quartz (SiO2)
Chert (Jasper)
Silicon Dioxide (SiO2)
Quartzite with Quartz Vein
Metamorphosed sandstone (SiO2)
Native Copper (Penny specimen)
Native Copper (Cu)
Quartzite
Quartzite (SiO2)
Chert (specifically Jasper/Brown Chert)
Silicon Dioxide (SiO2)
Basalt
Mafic Igneous Rock
Jasper and Agate
Microcrystalline Quartz (SiO2)
Cubic Zirconia (CZ)
Cubic Zirconium Dioxide (ZrO2)
Agate (River Pea)
Microcrystalline Chalcedony (SiO2)
Quartzite
Quartzite (primarily SiO2)
Yellow Diamond
Diamond (Carbon, C)
River Pebble (likely Quartzite or Chert)
Silicon Dioxide (SiO2) crystal conglomerate
Almandine Garnet
Almandine (Fe3Al2Si3O12)
Quartz (Tumbled/Polished Pebble)
Silicon Dioxide (SiO2)
White Topaz
Aluminum Silicate Fluoride Hydroxide, Al2SiO4(F,OH)2
Quartz Pebble
Silicon Dioxide (SiO2)
Basalt
Mafic Igneous Rock
Garnet in Matrix (likely Almandine in Quartz/Mica Schist)
Almandine Garnet (Fe3Al2(SiO4)3) in Quartz-Feldspar host rock
Quartzite Pebble
Quartzite (SiO2)
Quartz Pebble (Chalcedony/Agate variety)
Silicon Dioxide (SiO2)