Unknown

Rounded river pebble, likely quartzite

Quartzite (quartz-rich rock; identification from appearance is provisional)

Greenstone pebble (identification uncertain from photo)

Greenstone, typically metamorphosed mafic rock composed of chlorite, actinolite, and epidote

Greenstone pebble (likely serpentine-rich)

Serpentinite or chlorite-rich metamorphic rock; exact identification is uncertain from the photograph

Polished black pebble, likely basalt

Basalt, a fine-grained mafic volcanic rock; identification is tentative from the image

Tumbled feldspar-rich rock, possibly granite or gneiss

Indeterminate feldspar–quartz rock; exact identification requires testing

Pumice (likely)

Vesicular volcanic rock, typically rhyolitic to dacitic glass with minor feldspar and other minerals

Rounded pebble, likely sandstone or iron-stained quartzite

Unidentified clastic rock; composition cannot be determined from the image alone

Green aventurine (polished stone carving)

Quartz, SiO₂, with green fuchsite mica inclusions (aventurescent quartz)

Gold-bearing rock, possibly native gold in quartz or ironstone matrix

Native gold (Au); matrix not identifiable from the image

Chrysocolla-rich copper ore

Chrysocolla, a hydrated copper silicate; composition is variable and commonly mixed with quartz or copper oxides

Possible ironstone concretion

Iron-oxide-rich concretion, likely hematite/goethite; exact identification is uncertain from the photo

Serpentinite (probable)

Serpentinite, a rock composed chiefly of serpentine-group minerals such as antigorite, lizardite, or chrysotile

Quartz-rich mica schist (tentative)

Quartz–muscovite/biotite schist; exact identification requires closer examination

Small quartz-rich rock fragment

Unidentified quartz-bearing rock; the image is insufficient for a precise identification

Weathered rock fragment (possibly sandstone)

Indeterminate; likely iron-stained, quartz-rich sandstone

Flint (chert), likely a worked stone flake

Microcrystalline quartz (SiO₂); cryptocrystalline variety of quartz

Fossil-bearing limestone

Calcite-rich limestone (mainly CaCO₃), with a possible shell fossil

White quartz pebble

Quartz (SiO₂), likely massive milky quartz

Serpentinite

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

Rounded green-gray pebble, likely altered basalt

Fine-grained mafic volcanic rock; exact identification requires examination

Rounded pebble, likely quartzite

Quartzite (predominantly recrystallized quartz, SiO₂); identification is tentative from the image

Iron-stained quartz-rich rock (possibly quartzite)

Quartz-rich rock; identification as quartzite is tentative from the photograph

Likely raw metallic mineral specimen

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

Likely green serpentine or chlorite-rich rock

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

Iron-stained quartz-rich pebble

Likely quartz (SiO₂) with iron-oxide/hydroxide coatings; exact rock type cannot be determined from the image alone

Weathered volcanic breccia (possible basaltic-andesite breccia)

Volcanic breccia: angular to subrounded volcanic clasts in a finer volcanic matrix; exact composition cannot be confirmed from the photograph

Polished green stone bead, likely dyed howlite or magnesite

Possibly dyed Ca₂B₅SiO₉(OH)₅ (howlite) or MgCO₃ (magnesite); identification is uncertain from the photo

Gemstone cocktail ring, likely jade and quartz or glass beads

Possible jadeite (NaAlSi₂O₆) or nephrite (Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂); the peach-colored beads cannot be reliably identified from the image

Rounded gray-green pebble, possibly serpentinite

Unidentified greenish metamorphic rock; serpentinite is a tentative visual match

Quartz-bearing mica schist

Mica schist, likely quartz–muscovite/biotite schist

Likely basalt or another dark, coarse-grained igneous rock

Possibly olivine-bearing basalt (plagioclase, pyroxene, and possibly olivine); identification is uncertain from the photo

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

Brecciated rock, likely polymict breccia

Polymict breccia; exact lithology cannot be determined from the image

Tumbled greenstone (likely serpentine-rich)

Greenstone; commonly metamorphosed mafic rock composed of actinolite/chlorite with epidote and albite

Faceted yellow-brown gemstone ring, possibly citrine

Unidentified faceted gem; citrine is quartz (SiO₂), but the photo is insufficient for a reliable identification

Likely weathered iron-rich stone or concretion

Indeterminate; possibly ferruginous sandstone, ironstone, or a weathered sedimentary concretion

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 greenstone (likely serpentine or chlorite-rich basalt)

Serpentinite, principally serpentine-group minerals: Mg₃Si₂O₅(OH)₄; exact identification requires testing

Halite

Sodium Chloride (NaCl)

Halite (Rock Salt) Crust

Sodium Chloride (NaCl)