Faceted Glass (Costume Jewelry)
Amorphous Silicon Dioxide with colorants (Glass)
Synthetic/Man-made Material
Category
Mineral (Synthetic Paper And Ink Polymorph)
Browse mineral (synthetic paper and ink polymorph) specimens identified by the Rock Identifier community.
Concrete Paver (Artificial Cementitious Rock)
Hydrated Portland Cement Aggregate
Sedimentary (Synthetic)
Blue Goldstone
Aventurine Glass (Silicon Dioxide infused with Cobalt/Copper)
Synthetic (Man-made Glass)
Textile (Upholstery Fabric)
Woven Polyethylene/Polyester or Cotton Blend
Synthetic or Natural Fiber
Bowling Ball (Brunswick T-Zone Deep Space)
Polyester resin / Polyurethane polymer
Synthetic (not a natural rock)
ABS Plastic (Acrylonitrile Butadiene Styrene)
(C8H8)x·(C4H6)y·(C3H3N)z
Synthetic Polymer (Synthetic Material)
Hand-Drawn Gengar Pokémon Card Artist Item
Lignocellulosic Fiber (Cellulose, C6H10O5) with wax-based pigment (crayon/colored pencil)
Organic (Paper and Cellulose)
Man-made Blank Ammunition (Brass)
CuZn (Cartridge Brass - roughly 70% Copper, 30% Zinc)
Anticrystalline / Synthetic Alloy
3D Printed PLA Elephant (Silk Multi-color)
Polylactic Acid (C3H4O2)n
Synthetic Polymer (Polylactic Acid)
Glazed Ceramic Tile
Fused Silicate-Clay composite
Synthetic (Man-made material mimicking natural stone)
Green Slag Glass (Cullet)
Amorphous Silica (Industrial Glass Byproduct)
Synthetic/Byproduct (Non-igneous, non-sedimentary, non-metamorphic)
Red Swirl Beads (Likely Resin or Glass, simulating Red Jasper or Agate)
N/A (for the beads as pictured); Red Jasper: SiO2 (Chert variety); Red Agate: SiO2 (Chalcedony variety)
Organic (if resin) or Synthetic (if glass); simulating Sedimentary or Metamorphic (for natural stones)
Nephrite Jade
Nephrite
Mineral/Rock
Note regarding baguette production (not a rock)
Digital text image - Somali language
not a rock
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Olivine (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4
Mineral
Citrine
SiO2 (Silicon Dioxide)
mineral
Olivine in Basalt matrix
Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)
igneous
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Citrine
Crystalline Quartz (SiO2) with iron impurities
mineral
Satin Spar (Selenite variant)
Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Aventurine (likely Green Aventurine)
Silicon Dioxide (SiO2) with mineral inclusions
Mineral/Mineraloid within a rock matrix
Granite or Pegmatite with Mica
Granitoid
igneous
Amygdaloidal Basalt
Basalt with Secondary Mineral Infillings
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Malachite and Azurite on Matrix
Cu2CO3(OH)2 (Malachite) / Cu3(CO3)2(OH)2 (Azurite)
mineral
Precious Opal in Matrix
Hydrated Silica (SiO2·nH2O)
mineral
Dyed Quartz Geode
Silicon Dioxide (SiO2) with artificial pigment
mineral
Chalcopyrite in Quartz (Gossan/Iron Hat)
CuFeS2 (Chalcopyrite) with SiO2 (Quartz)
mineral
Chert / Flint
Cryptocrystalline quartz (SiO2)
Sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Amygdaloidal Basalt
Amygdaloidal Basalt containing Zeolite and Calcite inclusions
igneous
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Note: Item is not a geological specimen
Homo sapiens (Dermal Appendage: Pilus)
Organic / Biological
Muscovite Mica
Muscovite (Potassium Aluminum Silicate) - KAl2(AlSi3O10)(F,OH)2
mineral
Granite
Granite
Igneous
Malachite
Copper carbonate hydroxide Cu2CO3(OH)2
mineral
Pyrite in Quartz
FeS2 (Iron Pyrite) with SiO2 (Quartz)
Mineral/Igneous/Hydrothermal
Botryoidal Goethite
Goethite (α-Fe3+O(OH))
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Rutilated Quartz
Silicon Dioxide (SiO2) with inclusions of Titanium Dioxide (TiO2)
mineral