All rocks & minerals

Fossil Shell

Phylum Mollusca (Gastropod fossil)

Chert / Flint

Silicon Dioxide (Microcrystalline Quartz, $SiO_2$)

Seashell Fossil

Gastropoda fossil

Fossil Snail

Gastropoda (fossilized)

Native Copper

Copper (Cu)

Quartz Crystal

Silicon Dioxide (SiO2)

Quartzite

Quartzite

Pyrite

Iron Sulfide (FeS2)

Olivine

(Mg,Fe)2SiO4

Sedimentary River Rock

Siliciclastic Sedimentary Rock (Quartzite or Sandstone pebble)

Granite

Felsic intrusive igneous rock

Basalt

Extrusive igneous rock

Jasper

Silicon dioxide (Microcrystalline quartz, SiO2)

Shiva's Eye

Operculum of Turbo shells (Calcium carbonate)

Jasper

Microcrystalline Quartz (SiO2)

Jasper

Silicon dioxide (SiO2) microcrystalline quartz

Limestone

Calcareous sedimentary rock (CaCO3)

Epidote in Quartz

SiO2 with Ca2Al2(Fe3+,Al)(SiO4)3(OH)

Limestone

Limestone (Calcium Carbonate, CaCO3)

Common Quartz Pebble

Silicon dioxide (SiO2) rock fragment

Bivalve Fossil (Mussel or Clam Shell)

Bivalvia

Jasper

Microcrystalline Quartz (SiO2)

Basalt Pebble

Extrusive Igneous Rock

Quartzite Pebble

Metamorphic Quartzite

Gold Nugget

Gold (Au)

Agate Bookend / Quartz Geode

Silicon Dioxide (SiO2)

Peridot

Olivine ((Mg,Fe)2SiO4)

Fossil Coral

Rugosa or Tabulata coral fossil (Calcite/Silica replacement)

Amethyst

Quartz (Silicon Dioxide, SiO2)

Limpets Shell / Fossil Specimen

Patellogastropoda (Class)

Abalone Shell / Mother of Pearl

Haliotis sp. (Nacreous shell layer)

Unknown Dark Stone

Unknown

Fossilized Sand Dollar

Echinoidea (Clypeasteroida)

Quartz Pebble

Silicon Dioxide (SiO2)

Green Jasper

Microcrystalline Quartz (SiO2)

Sea Urchin Fossil

Echinoidea (test/fossil)

Granite

Intrusive Igneous Rock

Granite

Intrusive Igneous Rock

Jasper

Microcrystalline Quartz (SiO2)

Muscovite

KAl2(AlSi3O10)(OH)2

Quartzite

Metamorphic Quartzite (SiO2)

Jasper

Microcrystalline Quartz (SiO2)