Unknown

Rounded brown river pebble

Indeterminate lithic fragment; possibly weathered sandstone, mudstone, or basalt

Tiny amber-colored crystal fragment

Indeterminate; possibly quartz, feldspar, mica, or a sulfide mineral

Rounded river cobble, likely weathered volcanic or metamorphic rock

Indeterminate from photograph; possible basaltic-andesite, rhyolite, or quartz-rich metamorphic lithology

Unidentified small rock fragment

Likely quartz-rich material; exact identification is indeterminate from the image

Pale green translucent mineral fragment

Indeterminate; possibly fluorite, calcite, or glassy quartz

Charoite

Charoite (K(Ca,Na)2Si4O10(OH,F)·H2O)

Himalayan Pink Salt

Halite (NaCl) with iron oxide inclusions

Small metallic-looking rock fragment

Uncertain; possibly galena-bearing ore or mica-rich schist

Rock salt (Halite)

Halite (Sodium Chloride, NaCl)

Pink Halite (Himalayan Salt)

Halite (Sodium Chloride, NaCl)

Pink Himalayan Salt (Halite)

Halite - NaCl (Sodium Chloride) with trace Iron Oxide and Magnesium

Himalayan Pink Salt

Halite (NaCl) with trace minerals (Iron, Magnesium, Potassium)

Greenstone / serpentinized rock

Serpentinite, commonly dominated by serpentine-group minerals (antigorite, lizardite, or chrysotile)

Halite (Rock Salt)

Sodium Chloride (NaCl)

Pink Himalayan Salt Rock (Halite)

Halite (Sodium Chloride, NaCl)

Rose quartz (probable)

Quartz, SiO₂; pink coloration typically from trace inclusions or irradiation-related defects

Small gray stone, possibly granite or quartz-rich pebble

Indeterminate; likely a weathered quartz–feldspar rock fragment

Tumbled brown stone, possibly amber or polished agate

Indeterminate from image; possibilities include amber (fossilized plant resin, organic) or chalcedony/quartz (SiO₂)

Likely raw metallic mineral specimen

Unidentified; possibly galena-bearing ore or magnetite-rich rock

Likely metallic meteorite fragment

Undetermined iron or stony-iron meteorite; mineralogy requires testing

Likely weathered river pebble

Indeterminate lithology; possibly fine-grained sandstone, siltstone, or chert

Unidentifiable Specimen

Undetermined

Iron-rich jasper or brecciated chert

Microcrystalline quartz (SiO₂) with hematite/goethite inclusions

Tumbled gray stone, likely gray agate or jasper

Microcrystalline quartz (chalcedony), SiO₂; exact identification requires testing

Unknown Rock Specimen

Halite

Sodium Chloride (NaCl)

Halite (Rock Salt) Crust

Sodium Chloride (NaCl)

Serpentinite

Serpentinite; chiefly serpentine-group minerals (lizardite, chrysotile, antigorite), commonly with magnetite and minor talc

Likely green serpentine or chlorite-rich rock

Serpentine-group minerals, commonly lizardite/magnesite-bearing serpentinite; exact identification requires testing

Possible iron meteorite

Iron meteorite, likely kamacite–taenite alloy

Unknown metallic sulfide-bearing rock, possibly chalcopyrite or bornite

Tentative: chalcopyrite (CuFeS₂) or bornite (Cu₅FeS₄)

Serpentinite (likely)

Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, commonly with magnetite and minor carbonates

Likely iron sulfide specimen (pyrite or marcasite)

Pyrite, FeS₂; possibly marcasite, also FeS₂

Halite (Rock Salt)

Halite (Sodium Chloride, NaCl)

Likely botryoidal calcite or aragonite specimen

Calcite (CaCO₃), possibly aragonite (CaCO₃)

Veined dark metamorphic rock, likely serpentinite

Serpentinite, predominantly serpentine-group minerals (Mg₃Si₂O₅(OH)₄), with possible quartz, calcite, and magnetite veins

Rounded river pebble, likely basaltic rock

Fine-grained mafic igneous rock, probably basalt or andesite; exact identification requires testing

Unidentified pale pink rough mineral specimen

Possibly rose quartz or feldspar; identification is uncertain from the photograph

Halite (Rock Salt)

Halite (Sodium Chloride, NaCl)

Sandstone or Quartzite with algae

Unknown specific, largely SiO2 with biological growth

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

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

Tumbled dark green stone, likely serpentine

Serpentinite; chiefly serpentine-group minerals (Mg₃Si₂O₅(OH)₄)