Mineral Group

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Vesicular basalt

Basalt; predominantly plagioclase feldspar, pyroxene, and possible olivine

Weathered greenish metamorphic rock, possibly serpentinite

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

Garnet

Nesosilicate group (e.g., Almandine: Fe3Al2(SiO4)3)

Polished orbicular jasper beads

Jasper, microcrystalline quartz (SiO₂) with iron-oxide and other inclusions

Serpentine

Serpentinite (group of hydrous magnesium iron phyllosilicate minerals)

Garnet (likely Almandine or Pyrope)

Garnet Group (e.g., Almandine: Fe3Al2(SiO4)3; Pyrope: Mg3Al2(SiO4)3)

Serpentinite (likely serpentine-rich rock)

Serpentine-group minerals, chiefly antigorite/lizardite; commonly with magnetite, brucite, or relict olivine

Petrified Wood

Silicified Wood (primarily SiO₂)

Fossilized Gastropod in Limestone

Gastropoda (Class) in Calcium Carbonate (CaCO3)

Tumbled serpentine

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

Dalmatian jasper

Dalmatian stone; commonly a leucocratic alkali-feldspar-rich igneous rock with arfvedsonite or aegirine inclusions

Milky Quartz

Silicon Dioxide (SiO2)

Fossil shark teeth

Likely fossilized shark teeth, possibly Carcharhiniformes or related sharks; exact species cannot be determined from the photo.

Vesicular Basalt with Zeolite

Mafic volcanic rock with Hydrated Aluminosilicate minerals (Zeolite group)

Basalt

Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase and pyroxene, commonly with olivine

Quartz-rich pegmatite specimens

Granitic pegmatite; primarily quartz (SiO₂), with likely feldspar and minor mica/iron-oxide staining

Milky quartz

Quartz (silicon dioxide, SiO₂)

Amazonite

Amazonite (KAlSi3O8, a triclinic variety of Potassium Feldspar)

Polished dark green-black stone, likely serpentinite

Serpentinite (serpentine-group minerals; commonly antigorite, lizardite, and chrysotile)

Moonstone

Orthoclase Feldspar (KAlSi3O8)

Polished dark river pebble, likely serpentinite or altered ultramafic rock

Serpentinite (predominantly serpentine-group minerals; identification is provisional)

Polished serpentine

Serpentinite; mainly antigorite, lizardite, and chrysotile-group minerals

Serpentinite

Serpentinite (a rock composed predominantly of serpentine group minerals)

Serpentine

Serpentine Group Minerals (e.g., Antigorite, Chrysotile, Lizardite)

Blue-and-yellow sodalite-bearing rock (likely sodalite in nepheline syenite)

Sodalite, Na8(Al6Si6O24)Cl2, likely mixed with feldspar and/or nepheline

Almandine Garnet

Almandine (Fe3Al2(SiO4)3)

Almandine Garnet

Iron aluminum silicate (Fe3Al2(SiO4)3)

Chrysoprase

Nickel-bearing Chalcedony (SiO2 with Ni impurities)

Basalt River Stone

Aphanitic Mafic Igneous Rock

Weathered greenish metamorphic rock, likely serpentinite

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

Polished serpentine-rich stone (likely serpentine jasper or “rainforest jasper”)

Serpentine-group minerals, chiefly antigorite/lizardite, with iron oxides and silica-rich rock matrix

Mixed mineral and rock specimens

Undetermined assortment; individual pieces may include quartz, feldspar, mica, and other common minerals

Tumbled serpentine (likely antigorite-rich)

Serpentine-group minerals, chiefly Mg₃Si₂O₅(OH)₄

Lapis Lazuli

Lapis Lazuli (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2

Polished dark pebble, likely basalt

Basalt, chiefly plagioclase feldspar and pyroxene, with possible olivine or magnetite

Possible serpentine or greenstone pebble

Serpentine-group minerals, chiefly antigorite/lizardite; exact identification requires testing

Almandine Garnet

Almandine (Fe3Al2(SiO4)3)

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Rounded green-gray pebble, likely serpentinite

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

Banded Serpentine

Serpentine group (subgroup Lizardite or Antigorite) - Mg3Si2O5(OH)4

Moqui Marble

Ironstone Concretion (Goethite/Hematite)