Unknown (Likely Sedimentary Or Metamorphic)

Serpentinite pebble

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

Serpentine-rich metamorphic rock

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

White Buffalo Turquoise (or Howlite/Magnesite)

Calcite/Dolomite or Magnesite with Chert/Quartz inclusions

Serpentinite (probable)

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

Halite (Rock Salt)

Halite (NaCl)

Halite (Rock Salt)

Halite (Sodium Chloride, NaCl)

Tumbled serpentine

Serpentinite; chiefly antigorite, lizardite, and/or chrysotile Mg₃Si₂O₅(OH)₄

Unidentified gray rock fragment

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

Bituminous coal

Coal, predominantly carbon with macerals and minor clay/pyrite minerals

Serpentine-rich metamorphic cobble

Serpentinite, principally antigorite/lizardite Mg3Si2O5(OH)4, possibly with magnetite and minor carbonate

Serpentine-rich metamorphic rock

Serpentinite, dominated by serpentine-group minerals (antigorite/lizardite/chrysotile), with possible magnetite and carbonate

Green serpentine

Serpentine-group minerals, chiefly lizardite and antigorite; approximate formula Mg₃Si₂O₅(OH)₄

Green serpentine or nephrite-like stone

Serpentinite, chiefly serpentine-group minerals; exact identification would require testing

Rounded gray river cobble

Likely fine-grained sandstone, siltstone, or metamorphosed equivalent; exact identification requires a fresh surface and tests

Polished fossil coral

Fossilized coral, commonly agatized coral (silica replacing CaCO₃)

Polished brown agate/chalcedony nodule

Microcrystalline quartz (SiO₂), likely brecciated or weathered agate with possible carbonate/iron-oxide inclusions

Gravel / Small Pebble

Rock Fragment (Gravel)

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.

Unknown small pale rock fragment

Unidentified light-colored granular mineral aggregate; likely quartz-rich material or limestone

Small dark metallic-looking rock fragment

Undetermined; possibly iron oxide-rich material or a metallic mineral

Small polished amber or brown gemstone

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

Polished serpentine pendant

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

Serpentinite

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

Pink halite (pink rock salt)

Halite, sodium chloride (NaCl)

Quartz Vein in Pelite (Metamorphic Rock)

Hydrothermal Quartz Veining in Metasedimentary Rock (SiO2)

Unidentified brown mineral/rock fragment

Indeterminate from image; possibly iron-stained quartz, feldspar, or weathered limonite

Halite

Halite (Sodium Chloride, NaCl)

Unidentified pale yellow-green mineral/rock fragment

Possibly sulfur-bearing mineral, serpentine, or weathered limestone; exact identification requires testing

Agate

Silicon Dioxide (Chalcedony), SiO2

Agate

Chalcedony (SiO2)

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

Possible bituminous coal

Coal, predominantly carbon with macerals and minor mineral impurities

Zoisite with Hornblende

Zoisite (Ca2Al3(SiO4)3(OH)) with Amphibole inclusions

Blue slag glass or dyed glass-like industrial material

Amorphous silicate glass; likely copper-bearing blue slag, but possibly colored man-made glass

Tiger's Eye

Silicon dioxide (SiO2) - Pseudomorph after crocidolite

Silicified oyster fossil

Fossil oyster shell, commonly Ostrea or Crassostrea, replaced or encrusted by chalcedony/quartz

Charoite

Charoite (K(Ca,Na)2Si4O10(OH,F)·H2O)

Serpentinite (probable)

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

Quartz-bearing granite or pegmatite fragment

Likely granitic material composed mainly of quartz (SiO₂), feldspar, and possibly biotite or hornblende

Agate

SiO2 (Chalcedony/Quartz)

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)