Diamond
Diamond (C)
mineral
Category
Industrial Byproduct
Browse industrial byproduct specimens identified by the Rock Identifier community.
Cubic Zirconia (as used in jewelry setting)
Zirconium dioxide (ZrO2)
mineral
Aqua Aura Quartz
Titanium/Gold-coated Silicon Dioxide (SiO2)
mineral
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Schist (with Iron Oxide)
Mica Schist
metamorphic
Quartz Vein in Metamorphic Rock
Silicon Dioxide (SiO2) within Metasedimentary host
metamorphic
Coal (specifically Bituminous or Anthracite)
Organic sedimentary rock; primarily Carbon (C) with varying H, S, O, N
sedimentary
Rough Corundum (Sapphire/Ruby mixture)
Corundum (Aluminum Oxide, Al2O3)
mineral
Jasper
Silicon Dioxide (SiO2)
sedimentary
Gold-bearing Quartz
Lode Gold in Silicon Dioxide (SiO2)
mineral
Tiger's Eye (variations include Blue or Hawk's Eye)
Silicon Dioxide with Crocidolite inclusions (SiO2)
Metamorphic mineral
Pegmatite (with smoky quartz and tourmaline/biotite)
Pegmatitic Granite
igneous
Sandstone (Ferruginous)
Arenite (SiO2 with Fe2O3 inclusions)
sedimentary
Quartz Druze on Matrix
Silicon Dioxide (SiO2)
mineral
Cubic Zirconia (CZ) in Gold-Plated Setting
Cubic Zirconium Dioxide (ZrO2)
mineral
Gold Nugget
Native Gold (Au)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Quartz (Milky/Chalcedony variety)
Silicon Dioxide (SiO2)
mineral
Diamond (or Diamond Simulant like Cubic Zirconia)
Carbon (C) - if Diamond; Zirconium dioxide (ZrO2) - if Cubic Zirconia
mineral
Yellow Calcite (Banded Calcite)
Calcium Carbonate (CaCO3)
mineral
Yellow Quartz Pebble
SiO2 (Silicon Dioxide)
mineral
Chert (Jasper/Quartzite)
Microcrystalline Silicon Dioxide (SiO2)
sedimentary
Anthracite Coal
Anthracite
metamorphic
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Orange Calcite with Siderite/Iron Oxide Coating
Calcium Carbonate (CaCO3)
mineral
Mica Schist (with Muscovite)
Muscovite/Quartz Schist (KAl2(AlSi3O10)(OH)2)
metamorphic
Banded Sandstone (Differential Weathering)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Rough Diamond
Diamond (Native Element Carbon, C)
mineral
Water and Silt (Sedimentary Environment)
Suspended Sediment / H2O (dihydrogen monoxide)
sedimentary
Cultured Marble (Synthetic)
Polymer-matrix composite (typically calcium carbonate in polyester resin)
Synthetic / Composite Material
Asphalt / Bituminous Aggregate
Bituminous mixture (Hydrocarbon-based sediment)
sedimentary
Diamond (set in Gold)
Diamond (pure carbon, C)
mineral
Chert (specifically Flint or Jasper variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Transit Token (RTD Denver)
Nickel-plated brass or bronze alloy (Cu-Sn-Zn-Ni)
not a rock or mineral (anthropogenic material)
Artificial Rock Face (Faux Rock)
Glass Fiber Reinforced Concrete (GFRC)
man-made/construction material
Aura Quartz (Pink/Rose Aura Quartz)
Silicon Dioxide (SiO2) bonded with Platinum and/or Silver
mineral
Quartz (Engineered Stone Countertop)
Silicon Dioxide (SiO2) within a resin matrix
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Vesicular Basalt or Scoria
Basalt (extrusive volcanic rock)
igneous
Jasper
Agate/Jasper (Microcrystalline Quartz, SiO2)
sedimentary
Siltstone
Siltstone (primarily composed of microcrystalline Quartz and Feldspar)
sedimentary