Marble

Serpentinite

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

Pyritized Ammonite

Ammonitida (replaced by Iron Disulfide, FeS2)

Sandstone (likely Quartzose Sandstone)

Arenite (composed primarily of SiO2)

Eclogite

Eclogite (Omphacite-Garnet Rock)

Diamond

Carbon (C)

Chert (Jasper variation)

Silicon Dioxide (SiO2)

Chert (Flint)

Chert (SiO2)

Serpentinite

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

Sandstone (Gneissic or Banded)

Clastic Sedimentary Rock (composed predominantly of SiO2)

Serpentine

Antigorite / Lizardite / Chrysotile mix; (Mg, Fe)3Si2O5(OH)4

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)

Chert (Flint)

Cryptocrystalline Silica (SiO2)

River Rock (Greywacke/Sandstone)

Lithic Wacke

Sandstone

Arenite (SiO2 based)

Brain Coral Fossil

Family Mussidae or Merulinidae (Order Scleractinia)

Chert (Jasper/Flint variety)

Silicon dioxide (SiO2) - Microcrystalline Quartz

Fossilized Rugose Coral (Horn Coral)

Order Rugosa (Calcium Carbonate - CaCO3)

Banded Chert

Microcrystalline Quartz (SiO2)

Yellow Ochre / Limonite

Limonite (FeO(OH)·nH2O)

Peridot

Olivine (Mg, Fe)2SiO4

Sandstone

Arenite (primarily Quartz, SiO2)

Fossiliferous Limestone (Coquina)

Calcite (CaCO3) with Bioclastic inclusions

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Precious Red Coral

Corallium rubrum / Corallium japonicum

Chert (specifically Yellow Jasper variety)

Silicon Dioxide (SiO2)

Quartzite Pebble

Metamorphic Quartzite (primarily SiO2)

Fossilized Shark Tooth

Carcharodon (Galeocerdo sp. or Lamniform)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)

Gastropod Fossil

Phylum Mollusca, Class Gastropoda (Calcium Carbonate, CaCO3)

Fossilized Fish (Lepidotes)

Lepidotes sp. (Order: Lepisosteiformes)

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Chert (often called Flint)

Microcrystalline Quartz (SiO2)

Peridot

Olivine (Mg, Fe)2SiO4

Turquoise and Red Coral (with Grizzly Bear Claw)

Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Precious Coral (Corallium rubrum)

Fossil Coral

Cnidaria Anthozoa (Fossilized)

Chert (Flint)

Chert (SiO2)

Banded Chert

Silicon Dioxide (SiO2)

Chert (Tripolitic Chert / Flint Nodules)

Microcrystalline Quartz (SiO2)

Basalt (Beach Pebble)

Basalt (Aphanitic Mafic Igneous Rock)

Diamond

Diamond (pure Carbon, C)

Diamond

C (Carbon)