Cardstock (Paper)
Cellulose (C6H10O5)n
sedimentary (man-made)
Category
Synthetic Or Natural Fiber
Browse synthetic or natural fiber specimens identified by the Rock Identifier community.
Quartz (specifically Clear and Rose Quartz)
Silicon Dioxide (SiO2)
mineral
Digital Multimeter (Synthetic Object)
Digital Multimeter (DMM)
not a rock
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)
metamorphic
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)
metamorphic
Serpentine (Serpentinite)
Antigorite, Lizardite, and Chrysotile: (Mg,Fe)3Si2O5(OH)4
metamorphic
Tiger's Eye
SiO2 (Silicon Dioxide with inclusions of Goethite/Limonite)
Metamorphic
Bouncy Ball (Synthetic Rubber Polymer)
Polybutadiene / Ethylene Vinyl Acetate (EVA)
Synthetic material (Not a rock or mineral)
Tiger's Eye (Rough)
SiO2 (Silicon Dioxide / Pseudomorph of Quartz after Crocidolite)
Mineral / Metamorphic
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Seraphinite (Clinochlore)
Clinochlore (Mg,Fe2+)5Al(Si3Al)O10(OH)8
mineral
Tiger's Eye
Tiger's eye (Pseudomorph of Quartz after Crocidolite), SiO2
metamorphic
Portable Ceramic Space Heater
Polished Acrylonitrile Butadiene Styrene (ABS) Plastic with Ceramic Heating Elements
not a rock (synthetic/industrial object)
Ruby
Corundum (Al2O3 with Chromium traces)
mineral
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Rose Quartz
Silicon dioxide (SiO2)
mineral
Titanium-coated Metal Cube (Man-made Fidget Toy)
Titanium-anodized or electroplated alloy (e.g., Ti-coated Zinc or Aluminum)
Mineral alternative / Synthetic
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Blue Tiger's Eye
Silicon Dioxide (SiO2) with Crocidolite inclusions
Mineral (Pseudomorph)
Tiger's Eye (Rough)
Macrocrystalline Quartz (SiO2 with inclusions of Crocidolite)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)
metamorphic
Basalt
Basalt (containing Pyroxene, Plagioclase feldspar, and Olivine)
igneous
Basalt
Mafic Igneous Rock
igneous
Rough Ruby
Corundum (Al2O3 with Chromium impurities)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Basalt with Vesicular Texture
Basalt (SiO2 range 45-52%)
igneous
Ruby
Corundum (Al2O3 with Chromium trace impurities)
mineral
Clear Quartz crystals on a Matrix base (Geode fragment)
Silicon Dioxide (SiO2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Blue Chalcedony
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Bituminous Coal (with Anthracite or Vitrinite inclusion)
Organic-rich Sedimentary Rock (Carboniferous classification)
sedimentary
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Tiger's Eye (with Blue Tiger's Eye / Hawk's Eye)
Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)
metamorphic
Blue Tiger's Eye (Hawks Eye)
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Falcon's Eye (Blue Tiger's Eye)
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Crazy Lace Agate
Cryptocrystalline Quartz (Silicon Dioxide, SiO2)
mineral
Tiger's Eye
Pseudomorph of quartz after crocidolite (SiO2 with iron inclusions)
metamorphic
Painted River Rock
Anthropogenic-modified Siliciclastic Sedimentary Rock
Sedimentary
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Lapis Lazuli (Tumbled Stone)
Na6Ca2(Al6Si6O24)(SO4,S,Cl)2 (predominantly Lazurite)
metamorphic