Mineral Group

Dark veined metamorphic rock, likely serpentinite

Serpentinite; predominantly serpentine-group minerals, possibly with magnesite or calcite veins

Spinosaurus Tooth Fossil

Spinosaurus aegyptiacus (Calcium Phosphate/Apatite)

Eucrite Meteorite

Achondrite (Eucrite)

Belemnite (Fossilized Rostrum)

Belemnitida (Order), composed of Calcite (CaCO3)

Blue Apatite

Apatite (Group), Ca5(PO4)3(F,Cl,OH)

Serpentinite

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

Pink tourmaline rough crystals

Elbaite tourmaline, Na(Li,Al)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

Serpentine-rich metamorphic rock

Serpentinite, likely with magnetite and weathered ultramafic minerals

Blue Apatite

Apatite group (Ca5(PO4)3(F,Cl,OH))

Petoskey Stone

Hexagonaria percarinata

Basalt

Extrusive mafic igneous rock

Likely serpentinite (serpentine-rich rock)

Serpentinite, composed mainly of serpentine-group minerals (e.g., antigorite, lizardite, or chrysotile)

Tumbled jasper, likely picture or brecciated jasper

Microcrystalline quartz (SiO₂) with iron-oxide and other mineral impurities

Schist

Mica Schist (Group of medium-grade metamorphic rocks)

Blue apatite (likely dyed or enhanced)

Apatite group; fluorapatite, Ca5(PO4)3F, is the common blue variety

Greenish-gray rock fragment, likely serpentine-rich stone

Possibly serpentinite (serpentine-group minerals; identification is uncertain from the image)

Serpentine-rich ultramafic rock

Serpentinite (predominantly serpentine-group minerals: lizardite, chrysotile, and/or antigorite)

Likely dark green-black tumbled stone (possibly serpentine)

Unconfirmed; appearance is consistent with serpentine, a group of hydrated magnesium silicate minerals

Lapis Lazuli (Fragment)

Lazurite-rich metamorphic rock

Nephrite Jade (or Serpentine)

Nephrite (a variety of amphibole mineral tremolite-actinolite) or Serpentine Group minerals

Epidote

Epidote Group (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Serpentine-rich rock (likely antigorite serpentinite)

Serpentinite, composed mainly of serpentine-group minerals such as antigorite, lizardite, or chrysotile

Tumbled greenish stone, possibly serpentine or aventurine

Uncertain; likely serpentine-group mineral or quartz-rich green aventurine

Tumbled pale green stone, likely serpentine or jade imitation

Indeterminate; possible serpentine-group mineral (Mg₃Si₂O₅(OH)₄)

Polished green cabochon, likely aventurine or serpentine

Quartz aventurine (SiO₂) or serpentine-group mineral; visual identification is uncertain

Garnet

Garnet Group (Silicate mineral); general formula X3Y2(SiO4)3

Tumbled carnelian (red chalcedony)

Carnelian, a microcrystalline variety of quartz; SiO₂, commonly colored by iron oxides

Dark mafic rock, likely basalt with iron-oxide veining

Basalt; predominantly plagioclase and pyroxene, possibly olivine, with hematite/goethite staining

Black Tourmaline

Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Serpentine (likely antigorite/lizardite)

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

Serpentine-rich rock (possibly lizardite/serpentinite)

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

Garnet (Almandine or Pyrope)

Garnet group; (Fe,Mg)3Al2(SiO4)3

Olivine (Peridot when gem-quality)

Olivine Group (Magnesium Iron Silicate, (Mg,Fe)2SiO4)

Blue Apatite

Apatite group (Ca5(PO4)3(F,Cl,OH))

Almandine Garnet in Matrix

Almandine, Fe3Al2(SiO4)3

Polished greenstone / serpentine (probable)

Serpentinite, dominated by serpentine-group minerals such as antigorite, lizardite, or chrysotile

Tumbled serpentine (likely bowenite or antigorite)

Serpentine-group minerals, commonly antigorite: Mg3Si2O5(OH)4

Mixed tumbled river pebbles and beach stones

Polymictic alluvial gravel; components include quartz, chert, jasper, sandstone, and altered volcanic rocks

Likely weathered gray-green stone, possibly serpentinite

Serpentinite (predominantly serpentine-group minerals; identification uncertain from image)

Olivine (Peridot)

Olivine Group (Magnesium Iron Silicate), (Mg, Fe)2SiO4

Serpentine-rich metamorphic rock

Serpentinite, likely antigorite/lizardite with magnetite and possible chlorite or talc

Small green mineral specimen, possibly aventurine or serpentine

Uncertain; likely quartz-bearing aventurine (SiO₂) or serpentine-group mineral