Granite
Granite (Phaneritic Quartz-Feldspar Felsic Rock)
igneous
Category
Synthetic (Man Made Material Mimicking Natural Stone)
Browse synthetic (man made material mimicking natural stone) specimens identified by the Rock Identifier community.
Howlite (White Buffalo Turquoise)
Howlite (Calcium Borosilicate Hydroxide), Ca2B5SiO9(OH)5
mineral
Clear Quartz crystals on a Matrix base (Geode fragment)
Silicon Dioxide (SiO2)
mineral
Fursuit (Synthetic Fur Specimen)
Canis anthropomorphus syntheticus
Anthropomorphic Textile Construct
Diamond (or high-quality simulant like Cubic Zirconia)
Carbon (C) - Native Element
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Assorted Decorative Tumbled Stones (Quartz, Sodalite, Aventurine, Calcite)
Mixed Silicates and Carbonates (SiO2, Na8(Al6Si6O24)Cl2, CaCO3)
mineral
Red Dyed Howlite
Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)
mineral
Build-A-Bear Plush (Non-Geological)
Polyester fibers (C10H8O4)n and Synthetic Polymers
Anthropogenic / Non-mineral
Slag
Anthropogenic Vitrophyre (Iron or Smelting Slag)
Mineral-like byproduct
Tumbled Stone Collection (featuring Tiger's Eye, Rose Quartz, and Moss Agate)
Mixed Silicates and Oxides (predominantly SiO2 group minerals)
mineral
Note: The image provided is a fabric sock, not a geological specimen.
Polyester-Cotton Blend with Elastane
Synthetic/Natural Fiber (Non-Geological)
Pearl
Organic gemstone (Calcium carbonate - CaCO3)
mineral
Note: Item is not a geological specimen
Polyester mesh and Ethylene-vinyl acetate (EVA) polymer
Synthetic / Anthropogenic Material
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Slag
Anthropogenic glassy silicate
Mineral-like byproduct
Chert (Flint)
Chert (microcrystalline quartz)
sedimentary
Chalk
Carbonate rock (mainly CaCO3)
sedimentary
Diamond
Diamond (pure Carbon, C)
mineral
Smoky Quartz Cluster
Smoky Quartz (Silicon Dioxide - SiO2)
mineral
Diamond in Kimberlite
Diamond in Kimberlite Matrix (Diamond: C, Kimberlite: complex Potassic Peridotite)
igneous
Pearl
Calcium Carbonate (CaCO3) with Conchiolin
mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Coquina
Biogenic Limestone (Calcite, CaCO3)
sedimentary
Green Aventurine
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
Mineral
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Pearl
Aragonite / Calcium Carbonate (CaCO3)
mineraloid
Gneiss
Gneiss (a rock type, not a specific mineral with a formula)
Metamorphic Rock
Blue Quartzite (Dyed)
Silicon Dioxide (SiO2) with inclusions
metamorphic
Pearl
Aragonite (CaCO3 with conchiolin)
mineral
Ruby
Corundum (Al2O3 with Chromium traces)
mineral
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
mineral
Pearl
Calcium Carbonate (mostly Aragonite), CaCO3 (with conchiolin)
mineral
Nacre (Mother of Pearl)
Nacre (Biogenic Aragonite/Calcite composite, CaCO3)
mineral
Chalk
Micrite (primarily Calcium Carbonate, CaCO3)
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Agate (or Banded Agate)
Agate (a variety of Chalcedony, which is a cryptocrystalline form of Quartz); Chemical Formula: SiO₂ (Silicon Dioxide)
Mineral, specifically a Cryptocrystalline Quartz variety
Veined Quartz
SiO2 (Silicon Dioxide)
Mineral
Borosilicate Glass (Manufactured)
SiO2 + B2O3 (Silicon dioxide and Boron trioxide)
Synthetic/Amorphous Solid
Banded Sandstone (Liesegang Rings)
Sedimentary sandstone with Iron oxide precipitates
sedimentary
Green Fluorite (likely synthetic or heat-treated for jewelry)
Calcium Fluoride (CaF2)
mineral
Diamond (in Matrix)
Carbon (C)
mineral