Sedimentary Rock (Technically A Variety Of Chalcedony)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Fossiliferous Sedimentary Rock (Coquina/Limestone)

Fossiliferous Calcarenite / Bioclastic Limestone

Unidentified Rock Fragment

Unknown

Desert Varnish on Sandstone

Ferromanganese coating on Quartz Arenite

Sandstone (likely Arkosic or Lithic Sandstone)

Clastic Sedimentary Rock (SiO2 with assorted minerals)

Sandstone

Arenite (primarily SiO2)

Milky Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Blue Calcite (commonly sold as Caribbean Calcite)

Calcium Carbonate (CaCO3)

Veined Limestone (Micrite) with Quartz/Calcite Veins

Calcium Carbonate (CaCO3) with Silicate or Carbonate inclusions

Quartz Pebble (Milky Quartz)

Silicon Dioxide (SiO2)

Petrified Wood

Silicified Wood (primarily SiO₂ - Silicon Dioxide)

Sandstone (Ferruginous)

Arenite (SiO2 with Fe2O3 inclusions)

Sandstone (Greywacke/Siltstone variant)

Arenite / Wacke (SiO2 with diverse mineral inclusions)

Pink Granite

Phaneritic Plutonic Felsic Rock (Granite)

Sandstone (Quartzite-rich)

Clastic Sedimentary Rock (primarily SiO2)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Sandstone

Arenite (primarily SiO2 with various cementing agents)

Corundum (Sapphire in Host Rock)

Corundum (Aluminum Oxide, Al2O3)

Quartz (Milky/Common Quartz)

Silicon Dioxide (SiO2)

Basalt

Basalt (Mafic volcanic rock)

Horn Coral Fossil

Rugosa (extinct order of solitary corals)

Petrified Wood

Silicified Wood (primarily SiO₂)

Serpentine

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

Pink Granite

Granite (Phaneritic igneous rock rich in Orthoclase)

Quartz-veined Sedimentary Rock

Hydrothermally veined Clastic Sedimentary Rock (SiO2 veins in Matrix)

Blue Lace Agate (Banded Chalcedony)

Silicon Dioxide (SiO₂)

Milky Quartz Pebble

Quartz (Silicon Dioxide - SiO2)

Sandstone (likely Quartz Sandstone)

Arenite (composed primarily of SiO2)

Conglomerate

Conglomerate (clastic sedimentary rock)

Gray Chert (River Pebble)

Microcrystalline Quartz (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Rough Emerald/Green Beryl

Beryl (Be3Al2(SiO3)6) with trace amounts of Chromium or Vanadium

Amethyst

SiO2 (Silicon Dioxide)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Smoky Quartz

Smoky Quartz (SiO2: Silicon Dioxide)

Yellow Chert or Jasper

Microcrystalline Quartz (SiO2)

Green Moss Agate

Silicon Dioxide with inclusions (SiO2)

Conglomerate (or Breccia)

Clastic Sedimentary Rock (Conglomeratic)

Red Jasper (Opaque Chalcedony)

Silicon Dioxide (SiO2) with Hematite inclusions