Marble

Moqui Marble (Concretion)

Iron oxide concretion (Goethite/Hematite and Sandstone)

Moqui Marble (Concretion)

Iron Oxide Concretion (Hematite-cemented Sandstone)

Cream Marble (Speckled)

Metamorphosed Limestone (mainly CaCO3)

Inscribed limestone fragment

Calcitic limestone (primarily CaCO₃), possibly marble if recrystallized

Likely weathered limestone

Calcite-rich limestone (mostly CaCO₃), possibly dolomitic limestone

Silicon

Crystalline Silicon (Si)

Tumbled dark stone, possibly serpentinite

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

Serpentine

Antigorite, Lizardite, or Chrysotile; formula generally (Mg,Fe)3Si2O5(OH)4

Calcite

Calcium Carbonate (CaCO3)

Serpentine

Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

Tumbled limestone or calcitic marble

Calcite-rich carbonate rock; primarily calcium carbonate (CaCO₃)

Orange Calcite

Calcium Carbonate (CaCO3)

Green Calcite

Calcium Carbonate (CaCO3)

Blue Calcite

Calcium Carbonate (CaCO3)

Green Calcite

Calcium Carbonate (CaCO3)

Blue Calcite

Calcite (CaCO3)

Lapis Lazuli

Complex mixture of minerals, primarily Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2

Calcite

Calcium Carbonate (CaCO3)

Banded calcite crystal tower

Calcite (CaCO₃), likely honey or brown banded calcite

Pink Granite

Phaneritic Quartz-Feldspar Plutonic Rock

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (primarily SiO2)

Banded Quartzite with Epidote and Iron Oxides

Metasedimentary Quartzite (SiO2) with inclusions

White quartz-rich pebble, likely quartzite

Quartzite; predominantly microcrystalline quartz (SiO₂), possibly with minor feldspar or mica

Likely pink calcite fragment

Calcite (calcium carbonate, CaCO₃)

Quartzite

Quartzite (primarily SiO2)

Quartzite

Metamorphic Rock (Mainly SiO2)

Quartzite

Quartzite (SiO2)

Yellow Calcite

Calcium Carbonate (CaCO3)

Quartzite

Metamorphic Quartzite (SiO2)

Quartzite

Metamorphic Quartzite (SiO2)

Yellow Calcite

Calcium Carbonate (CaCO3)

Granitic Gneiss

Gneiss (Complex silicate composition)

Quartzite

Quartzite (SiO2)

Honey Calcite

Calcium Carbonate (CaCO3)

Quartzite Pebble

Quartzite (primarily SiO2)

Quartzite

Quartzite (principally SiO2)

Quartzite

Quartzite (SiO2)

Lapis Lazuli

Lapis Lazuli (Complex silicate rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Pyrite, and Calcite)

Howlite (White Buffalo Turquoise)

Howlite (Calcium Borosilicate Hydroxide), Ca2B5SiO9(OH)5

Light-colored limestone

Calcite-rich limestone (CaCO₃)

Rounded quartz-rich pebbles

Likely quartzite or quartz-rich sandstone; predominantly microcrystalline quartz (SiO₂)