Green-and-white terrazzo (likely serpentine/marble aggregate)
Composite decorative stone; probable serpentinite (Mg₃Si₂O₅(OH)₄) with white calcite marble fragments in cementitious matrix
metamorphic
Category
Antropogenic Rock (Man Made)
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Malaysian 50 Sen Coin
Coinage (specific alloy unknown without metallurgical analysis, but typically brass or bronze for this denomination and era)
Man-made object (coin)
Botryoidal chalcedony with iron-oxide staining
Microcrystalline quartz (SiO₂), likely iron-oxide-bearing chalcedony
mineral
Granite
Granitoid (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8 + SiO2)
igneous
Synthetic Faux Fur Fursuit
Polyacrylonitrile / Polyester (Synthetic Textile)
not a rock (synthetic material/costume)
Granite (Pegmatitic)
Phaneritic Felsic Igneous Rock
igneous
Crinoid Fossil in Limestone
Crinoid columnal (Class Crinoidea) in biomicrite
fossil
Chert Arrowhead (Lithic Tool)
Microcrystalline quartz (SiO2) - Archeological lithic artifact
sedimentary
Diorite (River Pebble)
Intermediate Phaneritic Igneous Rock
igneous
Granite
Phaneritic Plutonic Felsic Rock
igneous
Breccia
Breccia
sedimentary
White Marble
Recrystallized Calcite (CaCO3)
metamorphic
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Desert Rose (Baryte or Gypsum Rose)
Baryte (BaSO4) or Gypsum (CaSO4·2H2O)
mineral
Basalt
Basalt
igneous
Goldstone (likely blue-free synthetic goldstone pendant)
Synthetic aventurine glass; silica glass with dispersed metallic copper crystals
mineral
Goldstone and pink quartz bead strands
Goldstone is aventurescent copper-bearing glass; pink beads are likely rose quartz (SiO₂), though dyed or glass imitations are possible
mineral
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)
Tumbled orbicular granite
Granite, predominantly potassium feldspar, plagioclase, quartz, and biotite/hornblende
igneous
Limestone
Calcareous sedimentary rock (CaCO3)
sedimentary
Greenstone / serpentinite carving
Serpentinite, chiefly serpentine-group minerals (antigorite, lizardite, or chrysotile); exact identification requires testing
metamorphic
Granite
Intrusive Felsic Igneous Rock (primarily Quartz and Feldspar)
igneous
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Coquina and Oyster Fossil Rock
Coquina limestone (Calcium Carbonate, CaCO3) containing fossilized Crassostrea / bivalve shells
fossil
Sandstone
Sandstone (Quartz-rich Arenite / SiO2)
sedimentary
Carved yellow stone butterfly
Undetermined; possibly carved soapstone (talc-rich rock) or another soft ornamental stone
mineral
Geode (Unopened)
Quartz Geode (SiO2) / Chalcedony Concretion
mineral
Polished orbicular jasper (likely ocean jasper)
Siliceous microcrystalline quartz/chalcedony with iron-oxide and volcanic inclusions; commonly called ocean jasper
mineral
Tumbled gray chalcedony (likely agate or quartzite)
Microcrystalline quartz, SiO₂ (chalcedony)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Flint (chert) hand axe
Cryptocrystalline silica (SiO₂), worked into a bifacial stone tool
sedimentary
Coquina (Fossiliferous Limestone)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Tektite
Natural impact glass
meteorite
Probable amber fragment
Amber (fossilized plant resin; chiefly amorphous organic resin, commonly dominated by succinite)
gemstone
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert
Microcrystalline quartz (SiO2)
sedimentary
Chert
Microcrystalline quartz (SiO2)
sedimentary
Asphalt (Bituminous Concrete)
Composite material (bitumen binder with mineral aggregate)
man-made rock (technosol)
Slate
Metamorphic pelitic rock
metamorphic
Grey Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous