Metamorphic (Likely Gneiss Or Schist Based On Texture)

Chert Pebble (Jasper variety)

Microcrystalline Quartz (SiO2)

Prase or Green Quartz

Silicon Dioxide (SiO2 with actinolite or chlorite inclusions)

Sandstone (likely Quartzose Sandstone)

Arenite

Citrine

Citrine (Silicon Dioxide, SiO2)

Basalt

Extrusive mafic igneous rock

River Stone (likely Quartzite or Chert)

Recrystallized Silicon Dioxide (SiO2)

Granodiorite

Phaneritic Granodiorite

Granite

Course-grained intrusive igneous rock

Labradorite

Labradorite (Plagioclase Feldspar Series - (Ca, Na)(Al, Si)4O8)

Yellow Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (SiO2)

Milky Quartz Vein with Iron Staining

Silicon Dioxide (SiO2)

Chert (variously known as Flint or River Pebble)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

River Pebble (Likely Quartzite or Chalcedony)

Silicon Dioxide (SiO2) - granular metamorphic variety

River Rock (likely Quartzite or Quartz-rich Siltstone)

Quartzite (SiO2)

Emerald

Beryl (Be3Al2(SiO3)6) with trace Chromium/Vanadium

Orthoclase Feldspar (or K-Feldspar)

Orthoclase (KAlSi3O8)

Quartzite River Rock

Metamorphic Quartzite (primarily SiO2)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Basalt

Extrusive mafic igneous rock

Lepidolite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Coquina

Biogenic Limestone (Calcium Carbonate, CaCO3)

Coquina

Coquina Limestone

Granite

Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)

Greenschist

Greenschist facies rock (containing chlorite, actinolite, and epidote)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Granodiorite (containing Biotite and Quartz)

Granodiorite (Plagioclase-rich phaneritic intrusive rock)

Sandstone (Quartzose Sandstone)

Arenite (SiO2)

Basalt Beach Pebble

Basalt (Aphanitic Mafic Volcanic Rock)

Vesicular Basalt with Secondary Mineral Infill

Mafic Volcanic Rock (Basalt)

Serpentine

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

Amazonite (Amazon Stone)

Tectosilicate Microcline (KAlSi3O8)

Quartzite

Metamorphic Rock (Mainly SiO2)

Quartzite Cobble

Quartzite (primarily SiO2)

Gossan (Iron Hat)

Limonitic Gossan (Fe-oxide/hydroxide complex)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (SiO2)

Quartz with Hematite Inclusions

Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)

Crushed Limestone Aggregate

Limestone (Calcium Carbonate, CaCO3)

Ferruginous Sandstone with Quartz Inclusions

Clastic Sedimentary Rock (Iron-rich Sandstone)

Basalt with Quartz/Calcite Vein

Basalt (Mafic Volcanic Rock with secondary mineralization)