Unknown (Likely Sedimentary Or Metamorphic)

Dark mineral nodule with white veining

Possibly a calcite-veined manganese- or iron-rich concretion; exact identification requires testing

Dark gray pebble, possibly slate or fine-grained basalt

Unidentified fine-grained rock; visual identification is insufficient to distinguish slate from basalt

Small cream-colored fossil shell

Likely a fossilized gastropod or bivalve shell; exact identification is not possible from the image

Unknown white fragment

Unknown

Tumbled serpentinite (likely)

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

Iron-oxide-stained sandstone (likely ferruginous sandstone)

Quartz-rich sandstone cemented or stained by iron oxides, chiefly hematite (Fe₂O₃) and possibly goethite (FeO(OH))

Yellow serpentine (likely serpentine-rich rock)

Serpentinite; chiefly serpentine-group minerals, such as antigorite, lizardite, and chrysotile

Unknown Rock

Unknown

Small polished, cream-colored stone (possibly quartz or marble)

Unidentified; appearance alone cannot distinguish quartz (SiO₂) from calcite-rich marble (CaCO₃) or another pale stone

Tumbled serpentine (likely)

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

Small brown mineral or rock fragment

Undetermined; the image lacks enough detail for a reliable identification

Veined dark metamorphic rock, likely serpentinite

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

Assorted mineral and rock collection

Mixed specimens; individual species cannot be reliably identified from the image

Small gray translucent stone, possibly quartz or glassy mineral

Uncertain; likely microcrystalline quartz (SiO₂), but the image is insufficient for definitive identification

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

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

Uncertain greenish stone, possibly serpentine or altered basalt

Serpentine-group minerals, commonly Mg₃Si₂O₅(OH)₄; identification is provisional from the photograph

Tumbled greenstone (likely serpentinite or chlorite-rich metamorphic rock)

Serpentinite, commonly dominated by serpentine-group minerals; exact identification requires testing

Polished serpentine (likely bowenite/antigorite)

Serpentine-group minerals, chiefly antigorite or lizardite: Mg₃Si₂O₅(OH)₄

Green serpentine (likely serpentinite)

Serpentine-group minerals, commonly antigorite, lizardite, and/or chrysotile; rock name: serpentinite

Likely garnet-bearing rock (possibly almandine garnet in matrix)

Garnet, likely almandine (Fe₃Al₂Si₃O₁₂); host rock cannot be determined from the image

Likely biotite-rich mica schist

Mica schist, composed mainly of biotite and quartz, possibly with feldspar

Tumbled serpentine (likely antigorite-rich)

Serpentine-group minerals, chiefly Mg₃Si₂O₅(OH)₄

Banded sandstone

Quartz-rich sandstone, likely with iron-oxide staining

Chert (likely a small flake)

Microcrystalline quartz (SiO₂); the flake-like shape alone does not establish whether it is naturally fractured or worked

Tumbled dark green stone, likely serpentine

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

Polished banded jasper (likely red-and-gray jasper)

Microcrystalline quartz (SiO₂), commonly termed jasper; exact variety cannot be confirmed from the photo

Likely pyrite-bearing rock fragment

Pyrite (FeS₂), possibly in a weathered host rock; identification is uncertain from the image

Unidentified Small Rock

Unknown

Dyed red crystal aggregate, likely quartz or salt

Uncertain; possibly dyed quartz (SiO₂) or halite (NaCl)

Brecciated rock (possibly fault breccia)

Polymictic breccia; exact lithology cannot be determined from the photograph

Brick veneer, likely manufactured from clay-rich shale

Fired clay brick; chiefly aluminosilicate minerals, commonly mullite and glassy silicate phases after firing

Likely dark mineral-bearing rock fragments

Indeterminate from the photograph; possibly amphibolite or another dark, silicate-rich rock

Possible tumbled dark-green stone

Indeterminate from the blurry image; possibly serpentine or another green ornamental stone

Rounded pebble, likely sandstone or iron-stained quartzite

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

Serpentinized ultramafic rock with magnesite

Serpentinite, chiefly serpentine-group minerals (Mg₃Si₂O₅(OH)₄), with likely magnesite (MgCO₃) and minor chromite/magnetite

Quartz-bearing rock fragment

Undetermined quartz-rich rock; visible white material is likely quartz (SiO₂), with dark fine-grained host rock

Quartz-rich river pebble

Likely quartz-rich granitic rock; mainly quartz (SiO₂), with possible feldspar and mica

Small cream-colored tumbled stone, possibly quartz or feldspar

Undetermined; appearance alone is insufficient to identify the mineral

Unidentified green-gray mineral/rock fragment

Indeterminate from image; possible serpentine-bearing rock or chrysocolla/azurite-bearing material

Weathered fossil bone fragment

Fossilized vertebrate bone; taxon and age cannot be determined from the image

Quartz-rich rock, possibly milky quartz with iron staining

Predominantly silicon dioxide (SiO₂); exact rock type cannot be determined from the photo

White tumbled stone, possibly quartz or marble

Unidentified; appearance alone cannot distinguish quartz (SiO₂) from calcite-rich marble (CaCO₃).