This Is Not A Rock Or Mineral

Not a geological specimen

N/A (man-made object)

Metal Chain Belt with Square Plates

Not applicable (man-made)

Note regarding baguette production (not a rock)

Digital text image - Somali language

Unidentified small mineral fragments

Likely quartz- or feldspar-rich material; species cannot be determined reliably from the image

N/A (Non-Geological Specimen)

Granite

Granite — a coarse-grained felsic intrusive igneous rock, typically composed of quartz, feldspar, and mica

Portable Ceramic Space Heater

Polished Acrylonitrile Butadiene Styrene (ABS) Plastic with Ceramic Heating Elements

Small rounded pebble

Indeterminate; likely a weathered iron-rich silicate rock or concretion

Smurf Rock (Fictional Interpretation)

Cyanus Anthropomorphicus (Geologic Simulation)

Tumbled jasper pebble

Jasper, an opaque microcrystalline variety of quartz (SiO₂), commonly colored by iron oxides and hydroxides

Serpentinite

Serpentinite, a rock composed mainly of serpentine-group minerals (approximately Mg₃Si₂O₅(OH)₄)

Dyed druzy quartz pendant

Quartz, SiO₂; likely a dyed druzy quartz cluster

Polished red jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

Fossil bivalve shell

Likely an extinct or modern-like ribbed cockle/scallop; exact genus requires locality and diagnostic hinge features

Note on Image Identification: Textile

N/A (Anthropogenic material)

Cullet Glass (Slag)

Amorphous Silicon Dioxide (Man-made)

Bauxite

Bauxite (Mixture of Hydrous Aluminum Oxides)

Lapis Lazuli (Low Grade)

Lazurite-rich metamorphic rock ((Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2)

Possible iron-rich nodule or weathered ironstone

Limonite/goethite-rich concretion; commonly represented as FeO(OH)·nH₂O with iron oxides

Blue Crackle Quartz (Dyed Fire Agate/Quartz)

Silicon Dioxide (SiO2) with artificial dye treatment

Red-and-green jasper

Jasper, microcrystalline quartz (SiO₂), colored mainly by iron oxides and possibly chlorite/epidote

Likely pink granite pebble

Granite, a coarse-grained felsic intrusive rock (typically quartz, feldspar, and mica)

Chert (likely chalcedony-rich flint)

Microcrystalline quartz, SiO₂ (quartz/chalcedony)

Not a rock, mineral, or geological specimen

Baroque cultured pearl necklace

Pearl: nacre composed mainly of aragonite (CaCO₃) and conchiolin

Vesicular basalt (scoriaceous basalt)

Basalt; predominantly plagioclase, clinopyroxene, and olivine with iron oxides

Rounded pink granite cobble

Granite, chiefly quartz–alkali feldspar–plagioclase–biotite

Amazonite

Microcline feldspar (KAlSi₃O₈), green variety

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (Industrial Byproduct)

Selenite desert rose

Gypsum (CaSO₄·2H₂O), rosette habit

Bauxite

Bauxite (principal ore of aluminum, primarily Al(OH)3)

Iridescent bismuth crystal

Bismuth (Bi), artificially crystallized and likely oxidized/coated

Pink tumbled stone, likely dyed howlite or magnesite

Most likely magnesite (MgCO₃) or howlite [Ca₂B₅SiO₉(OH)₅], artificially dyed pink; exact identification requires testing.

Cowrie shell

Marine gastropod shell; likely a cowrie (family Cypraeidae), species not identifiable from the image

Lapis Lazuli (Tumbled)

Lazurite-dominated contact metamorphic rock

Lapis Lazuli

Na8[Al6Si6O24]Sn (Lazurite-rich metamorphic rock)

Lapis Lazuli

Lazurite-dominant Metamorphic Rock (complex aluminosilicate)

Weathered granitic rock fragment

Granite, likely quartz–feldspar–biotite aggregate

Weathered granite or granitic gneiss pebble

Granite: quartz + feldspar + mica; possibly weakly foliated gneiss

Yellow quartz-bearing rock, possibly sulfur-stained quartz or calcite

Indeterminate; likely quartz (SiO₂) and/or calcite (CaCO₃) with yellow iron/sulfur staining

Bauxite

AlOx(OH)3-2x (mixture of Gibbsite, Boehmite, and Diaspore)

Mixed rounded gravel and weathered rock fragments

Polymictic alluvial or glacial gravel; composition appears to include basaltic, quartz-rich, and feldspathic clasts