Dyed or coated quartz geode
Quartz geode; silicon dioxide (SiO₂), likely artificially color-enhanced
mineral
Category
Sedimentary (Artificial)
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Citrine
Quartz (SiO2) - specifically, a variety of macrocrystalline quartz
mineral
Peridot and Citrine Gemstones (in a ring setting)
Peridot (Olivine: (Mg,Fe)2SiO4), Citrine (Quartz: SiO2)
mineral
Rainbow aura quartz cluster
Quartz, silicon dioxide (SiO₂), artificially coated with a thin metallic film
mineral
Peacock ore (iridescent chalcopyrite, possibly bornite)
Chalcopyrite, CuFeS₂; the iridescent surface may be natural tarnish or artificial acid treatment. Similar material is bornite, Cu₅FeS₄.
mineral
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.
Man-made Material (jewelry, metal alloy)
Peacock Ore
Bornite (Cu5FeS4)
mineral
Smurf Rock (Fictional Interpretation)
Cyanus Anthropomorphicus (Geologic Simulation)
Artificial/Fantasy Object
Slag (Industrial Byproduct)
Ferrous/Non-ferrous Silicate
igneous (artificial/anthropogenic)
Slag
Ferrous Slag (Amorphous calcium-magnesium-aluminum silicates)
igneous (artificial/anthropogenic)
Pearls
Aragonite (calcium carbonate) and Conchiolin
Mineraloid
Smoky Quartz
SiO2 (Silicon Dioxide)
Mineral
Smoky Quartz
Smoky Quartz (SiO2)
Mineral
Man-made Polished Porcelain Tile (Artificial Geologic Lookalike)
Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)
Synthetic (Ceramic)
Red Tiger's Eye beads
Tiger's Eye (variety of Chalcedony, SiO2)
Mineral / Gemstone (variety of Quartz)
Smoky Quartz
Quartz (SiO₂)
Mineral
Citrine
Quartz (SiO₂)
mineral
Blue Lace Agate
Chalcedony (a form of Quartz) - SiO2
Mineral
Ocean Jasper
Orbicular Jasper (variety of Chalcedony - SiO2)
Mineral
Banded malachite cabochon
Malachite, Cu₂CO₃(OH)₂; the dark bands may be manganese-oxide or other sulfide-rich matrix, and could also indicate a composite or treated specimen
mineral
Goldstone
N/A (Synthetic Glass with Copper Inclusions)
Manufactured Glass
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
sedimentary
Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary
Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
sedimentary
Shale
Shale (clastic sedimentary rock)
sedimentary
Banded Siltstone / Mudstone Pebble
Siltstone / Argillite
sedimentary
Fossiliferous Concretion
Septarian Concretion containing Brachiopods/Crinoids
fossil
Shale fragment
Shale (clay mineral rich sedimentary rock)
sedimentary
Shale / Mudstone
Sedimentary rock (Claystone / Mudstone / Shale)
sedimentary
Brown Sandstone (River Rock)
Arenite
sedimentary
Shale
Sedimentary Shale
sedimentary
Shale and Pebble Fragment
Sedimentary Rock (Mudstone/Shale with Silica Pebble)
sedimentary
Shale
Argillaceous sedimentary rock
sedimentary
Mudstone
Argillite / Siliciclastic sedimentary rock
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3)
sedimentary
Sandstone Grain
Clastic Sedimentary Rock Grain (SiO2 dominated)
sedimentary
Shale or Slaty Mudstone
Argillaceous sedimentary rock
sedimentary
Cone-in-cone structure (Limestone)
Cone-in-cone structure (Secondary Sedimentary Structure)
sedimentary