Man Made Rock (Technosol)

Small metallic-looking mineral/rock fragment

Indeterminate from image; possibly galena, hematite, or metallic slag

Gemstone jewelry ensemble

Likely mixed gemstone and glass-bead jewelry; exact stones cannot be determined from the image

Green-and-white terrazzo (likely serpentine/marble aggregate)

Composite decorative stone; probable serpentinite (Mg₃Si₂O₅(OH)₄) with white calcite marble fragments in cementitious matrix

Granite

Granitoid (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8 + SiO2)

Botryoidal chalcedony with iron-oxide staining

Microcrystalline quartz (SiO₂), likely iron-oxide-bearing chalcedony

Breccia

Breccia

Diamond (in a jewelry setting)

Diamond (Carbon, C)

White Marble

Recrystallized Calcite (CaCO3)

Granite (Pegmatitic)

Phaneritic Felsic Igneous Rock

Synthetic Faux Fur Fursuit

Polyacrylonitrile / Polyester (Synthetic Textile)

Desert Rose (Baryte or Gypsum Rose)

Baryte (BaSO4) or Gypsum (CaSO4·2H2O)

Luminous Stone (Glow-in-the-dark Synthetic/Man-made Stone)

Strontium Aluminate tinted glass or resin (Crystalline silicate/oxide mix)

Crinoid Fossil in Limestone

Crinoid columnal (Class Crinoidea) in biomicrite

Diorite (River Pebble)

Intermediate Phaneritic Igneous Rock

Granite

Phaneritic Plutonic Felsic Rock

Basalt

Basalt

Malaysian 50 Sen Coin

Coinage (specific alloy unknown without metallurgical analysis, but typically brass or bronze for this denomination and era)

Pink Granite

Phaneritic Felsic Intrusive Igneous Rock

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

Goldstone (likely blue-free synthetic goldstone pendant)

Synthetic aventurine glass; silica glass with dispersed metallic copper crystals

Tumbled orbicular granite

Granite, predominantly potassium feldspar, plagioclase, quartz, and biotite/hornblende

Chert

Microcrystalline Quartz (SiO2)

Limestone

Calcareous sedimentary rock (CaCO3)

Sandstone

Sandstone (Quartz-rich Arenite / SiO2)

Greenstone / serpentinite carving

Serpentinite, chiefly serpentine-group minerals (antigorite, lizardite, or chrysotile); exact identification requires testing

Granite

Intrusive Felsic Igneous Rock (primarily Quartz and Feldspar)

Geode (Unopened)

Quartz Geode (SiO2) / Chalcedony Concretion

Polished orbicular jasper (likely ocean jasper)

Siliceous microcrystalline quartz/chalcedony with iron-oxide and volcanic inclusions; commonly called ocean jasper

Tumbled gray chalcedony (likely agate or quartzite)

Microcrystalline quartz, SiO₂ (chalcedony)

Sandstone

Arenite (SiO2 primarily)

Coquina and Oyster Fossil Rock

Coquina limestone (Calcium Carbonate, CaCO3) containing fossilized Crassostrea / bivalve shells

Tektite

Natural impact glass

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Flint (chert) hand axe

Cryptocrystalline silica (SiO₂), worked into a bifacial stone tool

Chert

Microcrystalline quartz (SiO2)

Coquina (Fossiliferous Limestone)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Chert

Microcrystalline quartz (SiO2)

Granodiorite

Granodiorite (Quartz + Plagioclase + Alkali Feldspar + Biotite/Hornblende)

Pink Granite

Phaneritic Felsic Intrusive Igneous Rock

Slate

Metamorphic pelitic rock

Yooperlite (Syenite clast containing fluorescent Sodalite)

Sodalite-bearing Syenite

Chert (Chalcedony/Agate)

Microcrystalline Quartz (SiO2)