Unknown (Likely Sedimentary Or Metamorphic)

Probable fossil-bearing rock or mineral concretion

Unidentified carbonate-rich concretion with a possible fossil inclusion

Quartz Vein in Sedimentary Matrix

Silicon Dioxide (SiO2) with host rock

Likely mica-rich schist

Mica schist, probably muscovite- and/or biotite-bearing; exact identification requires closer examination

Quartz fragment

Quartz (silicon dioxide, SiO₂)

Small polished amber or brown gemstone

Indeterminate from image; possibly amber (fossilized plant resin) or brown chalcedony/quartz

Turquoise bead necklace

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; likely stabilized or imitation beads cannot be ruled out from the image

Banded gneiss

Quartz–feldspar gneiss, possibly biotite-bearing; exact identification requires testing

Painted River Rock

Painted Quartzite or Smooth Siltstone

Banded gneiss

Foliated gneiss, likely quartz–feldspar–biotite gneiss

Weathered dark shale or slate-like rock

Fine-grained argillaceous rock; exact identification requires examination of a fresh surface

Quartz (likely Rose or Milky Quartz)

Silicon Dioxide (SiO2)

Small white mineral fragment

Indeterminate; possibly quartz, calcite, or feldspar

Uncertain gray metamorphic rock, likely gneiss or schist

Quartz–feldspar–mica rock; exact identification requires close examination

Mica-rich schist (likely quartz-mica schist)

Quartz–mica schist, commonly containing muscovite and/or biotite with quartz and feldspar

Pyrite

Iron Sulfide (FeS2)

Serpentine-rich rock (probable serpentinite)

Serpentinite; predominantly serpentine-group minerals, commonly antigorite, lizardite, or chrysotile, with possible magnetite and carbonate

Pink-purple faceted gemstone ring (likely garnet)

Likely almandine–pyrope garnet, (Fe,Mg)₃Al₂(SiO₄)₃; identification from the image is uncertain.

Possible petrified wood or fossilized tooth

Unidentified silicified fossil; exact identification requires close examination

Possible fossilized bone fragment

Indeterminate mineralized bone; taxon and age cannot be determined from the photo

Unidentified gray rock fragment

Indeterminate from image; possibly quartz- or feldspar-rich silicate material

Quartz Pebble

Crystalline Silicon Dioxide (SiO2)

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Likely biotite-rich schist

Mica schist, likely biotite-rich; exact minerals cannot be confirmed from the photo

Likely mica-rich schist fragment

Mica schist; exact mineral identification is uncertain from the image

Unknown Organic Object (likely a berry or fruit)

Not applicable; this is not a geological specimen. If it were a cranberry, its scientific name would be Vaccinium macrocarpon; if a cherry, it would be Prunus avium or Prunus cerasus.

Likely mica-rich schist

Mica schist, probably muscovite- or biotite-bearing; exact minerals cannot be confirmed from the photo

Banded metamorphic rock, likely gneiss

Biotite–quartz–feldspar gneiss, possibly amphibolite-bearing

Serpentinite

Serpentinite, dominated by serpentine-group minerals (chrysotile, lizardite, antigorite), commonly with magnetite and chlorite

Pyrite-bearing metamorphic rock (likely schist or quartzite)

Mica/quartz-rich metamorphic matrix with pyrite (FeS₂), possibly chalcopyrite (CuFeS₂)

Pale green tumbled mineral fragment, likely serpentine or green calcite

Probable serpentine-group mineral (Mg3Si2O5(OH)4) or, less likely, calcite (CaCO3); identification is uncertain from the photograph

Quartz-veined metamorphic rock, likely schist or phyllite

Quartz-bearing mica schist/phyllite; exact identification requires closer examination

Banded gneiss

Foliated gneiss, likely quartz–feldspar–mica gneiss

Probable fossil tooth fragment

Indeterminate fossilized vertebrate tooth; species cannot be identified from this image

Possible ironstone or iron-oxide-rich mineral fragment

Unidentified iron oxide/hydroxide, possibly goethite or limonite

Unidentified pale mineral or rock specimen

Indeterminate; image quality prevents reliable mineral identification

Quartz vein fragment

Quartz, silicon dioxide (SiO₂), likely milky to translucent quartz with iron-oxide or clay inclusions

Possible bituminous coal

Coal, predominantly carbon with macerals and minor mineral impurities

Pink halite (pink rock salt)

Halite, sodium chloride (NaCl)

Gold-colored mineral specimen, likely pyrite or weathered mica schist

Tentatively pyrite (FeS₂); identification is uncertain from the obscured image

Weathered foliated metamorphic rock, likely mica schist

Mica schist (likely quartz–muscovite/biotite schist; exact identification requires closer inspection)

Weathered iron-rich metamorphic rock (probable amphibolite or schist fragment)

Likely hornblende–plagioclase amphibolite with biotite/chlorite alteration; exact identification requires testing

Likely banded gneiss

Gneiss, a foliated metamorphic rock composed chiefly of quartz, feldspar, and mica