Tiger's Eye (variations include Blue or Hawk's Eye)
Silicon Dioxide with Crocidolite inclusions (SiO2)
Metamorphic mineral
Category
Industrial By Product
Browse industrial by product specimens identified by the Rock Identifier community.
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
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
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
Mineral
Jasper (Multi-colored) / Sea Glass Slag
Silicon Dioxide (SiO2) with impurities of Iron Oxide
Sedimentary (if natural Jasper) or Artificial (if Slag)
Asphalt / Bituminous Aggregate
Bituminous mixture (Hydrocarbon-based sediment)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
White Quartzite
Quartzite (primarily SiO2 - Silicon Dioxide)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (composed primarily of SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite (River Cobble)
Quartzite (primarily SiO2)
metamorphic
Slag (Industrial Glassy Byproduct)
Ferro-silicate Slag
Anthropogenic / Non-Natural
Diamond
Native Carbon (C)
mineral
Cubic Zirconia (CZ)
Cubic Zirconium Dioxide (ZrO2)
mineral (synthetic)
Red Garnet
Pyrope or Almandine (Silicate group, X3Y2(SiO4)3)
Mineral
Artificial Rock Face (Faux Rock)
Glass Fiber Reinforced Concrete (GFRC)
man-made/construction material
Ferruginous Slag (Iron Smelting Byproduct)
Fused Silicate Scoria (Amorphous mixture of FeO, SiO2, and CaO)
Antropogenic Glass / Mineraloid
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
Water and Silt (Sedimentary Environment)
Suspended Sediment / H2O (dihydrogen monoxide)
sedimentary
Diamond (set in Gold)
Diamond (pure carbon, C)
mineral
Chert (specifically Flint or Jasper variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Red Garnet (Pyrope or Almandine)
Garnet Group (A3B2(SiO4)3)
mineral
Quartz (Engineered Quartz Surface)
Silicon Dioxide (SiO2) based composite
mineral (man-made composite)
Green Slag
Anthropogenic Silicate Glass
Mineraloid (Industrial byproduct)