Schist
N/A (a rock type, not a mineral formula)
Category
Browse synthetic (not a rock or mineral) specimens identified by the Rock Identifier community.
Schist
N/A (a rock type, not a mineral formula)
Fursuit (Synthetic Fur Specimen)
Canis anthropomorphus syntheticus
N/A - Non-Geological Item
Blue Goldstone
Aventurine glass (Synthetic borosilicate glass with cobalt and metallic inclusions)
Opal
Hydrous silicon dioxide (SiO2·nH2O)
Bismuth
Bismuth (Bi)
Cullet Glass (Strawberry Glass)
Amorphous Silicon Dioxide (SiO2) with metallic dopants
Amethyst
Amethyst (SiO2 - Silicon Dioxide with iron impurities)
Man-made Blank Ammunition (Brass)
CuZn (Cartridge Brass - roughly 70% Copper, 30% Zinc)
Serpentinite
Serpentinite (a rock composed predominantly of serpentine group minerals)
Diamond (faceted)
Diamond (Pure Carbon, C)
Goldstone (Red/Brown)
Aventurine Glass (SiO2 with Copper inclusions)
Pumice
Pumice (volcanic rock)
Biological Bone (Patella/Knee)
Patella (part of the Human Skeletal System)
Crystal Quartz Beads (likely Clear Quartz)
Quartz (SiO₂)
Diamond (Rough)
Diamond (Carbon, C)
Oak-grain Laminate (Industrial/Decorative Furniture Finish)
Melamine Resin-impregnated Decorative Paper on Particleboard (Cellulose/Thermosetting Plastic)
Bowling Ball (Brunswick T-Zone Deep Space)
Polyester resin / Polyurethane polymer
Synthetic Zinc/Polycarbonate Composite (Bey-specimen)
Zinc Alloy (Zamak 3) with Polycarbonate (C15H16O2)n Overlay
Granite
Granite (a felsic intrusive igneous rock)
Azurite-Malachite (often a mixed specimen)
Azurite: Cu3(CO3)2(OH)2; Malachite: Cu2(CO3)(OH)2. The specimen appears to be a natural mixture or intergrowth of these two minerals.
Diamond
Carbon (C), Native Element
Copper Ore / Altered Granodiorite
Cupriferous rock with silicate gangue
Banded Iron Formation (Fragment)
Banded Iron Formation (BIF)
Basalt with Quartz Vein
Mafic volcanic rock with hydrothermal SiO2 filling
Rock Specimen
Unclassified rock specimen
Honey-colored chalcedony (possibly yellow/orange agate or carnelian)
Chalcedony, a microcrystalline variety of quartz; SiO₂. The color may result from iron-oxide inclusions. Exact identification is uncertain from a photograph alone.
Quartz (Druzy) in host rock
SiO₂ (Silicon Dioxide) as Quartz, with unspecified host rock components (likely silicates and iron oxides)
Metal Alloy (Jewelry)
Not a naturally occurring rock or mineral; likely a metal alloy for jewelry. Possible compositions include sterling silver (92.5% silver, 7.5% copper), or other silver/gold alloys.
Gneiss
Gneiss (a rock type, not a specific mineral with a formula)
Emerald
Beryl (Be3Al2Si6O18), specifically the green variety colored by chromium or vanadium
Blue Goldstone
Aventurine Glass
Black Tourmaline (Schorl)
Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)
Basalt with Xenolith
Extrusive Igneous Rock containing Mantle Xenolith
Diamond (appearing as a jewelry centerpiece)
Diamond (Formula: C)
Strawberry Quartz
Silicon Dioxide (SiO2) with inclusions of Goethite or Hematite
Bauxite Ore
Hydrated aluminum oxides (e.g., Gibbsite Al(OH)3, Boehmite ̲̲̲̲AlOOH, Diaspore ̲̲̲̲AlOOH)
Sodalite
Sodalite (Na4Al3Si3O12Cl)
Red Sandstone
Clastic Sandstone (typically Quartz-rich with Iron Oxide)
River Rock / Stream Pebble
Fluvial Clast / Rounded Sedimentary Particle
Rutilated Quartz
SiO2 with TiO2 inclusions (Rutile)
Sapphire
Corundum (Al2O3)