Petrified Wood
Silicified Wood (SiO2 - Silicon Dioxide)
sedimentary
Category
Man Made Object (Simulant)
Browse man made object (simulant) specimens identified by the Rock Identifier community.
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Sapphire
Corundum (Al2O3)
mineral
Fossil gastropod shell
Fossilized marine gastropod; exact genus/species requires locality and examination
fossil
Polished orbicular stone, likely granite or diorite
Granite–diorite, composed mainly of feldspar, quartz, and dark amphibole/biotite
igneous
Polished orbicular/porphyritic granite or breccia
Likely potassium-feldspar–quartz granite with amphibole/biotite and epidote; exact variety uncertain from the image
igneous
Nephrite Jade
Nephrite
Mineral/Rock
Titanium Aura Quartz (Aura Quartz)
Titanium-coated Silicon Dioxide (SiO2)
mineral
Diamond (appearing in jewelry)
Diamond (pure Carbon, C)
mineral
Jade (Nephrite or Jadeite)
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2 - a variety of actinolite, an amphibole mineral); Jadeite (Na(Al,Fe3+)Si2O6 - a pyroxene mineral)
Metamorphic rock (for both Nephrite and Jadeite)
Diamond
Native Carbon (C)
gemstone
Diamond (in a jewelry setting)
Carbon (C)
mineral
Tumbled brown jasper pebble
Jasper, microcrystalline quartz (SiO₂), commonly with iron-oxide impurities
mineral
Diamond (in Jewelry)
Diamond (Carbon, C)
mineral
Diamond
Carbon (C)
gemstone
Petrified Wood (Silicified Fossil)
Silicified Wood (SiO2)
sedimentary
Jade (likely Jadeite)
Jadeite (a pyroxene mineral) or Nephrite (a variety of amphibole mineral)
Mineral
Granite
Granite (a common rock type, not a single mineral with a formula. Composed primarily of quartz, feldspar, and mica/amphibole).
igneous
Diamond (in Jewelry Setting)
Carbon (C)
gemstone
Unknown Organic Object (likely a berry or fruit)
Not applicable; this is not a geological specimen. If it were a cranberry, its scientific name would be Vaccinium macrocarpon; if a cherry, it would be Prunus avium or Prunus cerasus.
Organic Material (likely a fruit or berry)
Amethyst cluster
Amethyst, purple quartz (SiO₂)
mineral
Polished amethyst pyramid
Amethyst, purple quartz (SiO₂)
mineral
Asphalt Pavement (with aggregate)
Asphalt concrete
man-made composite
Cardstock (Paper)
Cellulose (C6H10O5)n
sedimentary (man-made)
Blue Slag Glass
Amorphous Silica (Byproduct of smelting)
Antropogenic (Man-made)
Blue Goldstone
Aventurine Glass (SiO2 with Cobalt/Copper inclusions)
man-made glass
Synthetic Resin (Artificial Specimen)
Polyurethane or Polyester Resin
mineraloid (man-made)
Slag Glass (Cullet)
Amorphous Silicon Dioxide (SiO2) with metal oxide colorants
Anthropogenic (Man-made)
Slag (Anthropogenic Glass/Iron byproduct)
Ferro-silicate Slag
Anthropogenic (Man-made)
Artisanal Glass Beads (Simulated Goldstone or Aventurine Glass)
Silicon Dioxide (SiO2) with metallic inclusions
man-made material
Petrified Wood
Silicified wood (primarily Silicon Dioxide, SiO2)
sedimentary
Blue slag glass or dyed glass-like industrial material
Amorphous silicate glass; likely copper-bearing blue slag, but possibly colored man-made glass
mineral
Yellow Sapphire (Raw)
Corundum (Al2O3)
mineral
Chalk
Micrite (primarily Calcium Carbonate, CaCO3)
sedimentary
Jadeite (Jade)
Jadeite, NaAlSi₂O₆
metamorphic
Diamond
Carbon (C)
mineral
Moissanite
Silicon Carbide (SiC)
mineral
Petrified Wood (Agatized/Silicified Wood)
Silicified Wood / Chalcedony (SiO2)
sedimentary
Gold (Elemental Metal)
Gold (Au)
Mineral
United States Quarter Dollar
Cupronickel Clad Alloy (75% Copper, 25% Nickel over a 100% Copper core)
Metal / Man-made mineral-like object
Blue Goldstone
Synthetic glass with copper or cobalt/manganese inclusions
man-made glass
Blue Goldstone
Synthetic Aventurescent Glass (Cobalt-doped soda-lime glass)
man-made glass
Blue Goldstone
Aventurine glass (Synthetic borosilicate glass with cobalt and metallic inclusions)
man-made glass