Mineral, Specifically A Rock Fragment

Granite

Granite (felsic intrusive igneous rock)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Gneiss (specifically Pink Gneiss)

Gneiss (high-grade regional metamorphic rock)

Chert

Siliceous sedimentary rock (predominantly microcrystalline quartz, SiO2)

Granite (specifically Brown Granite Countertop)

Phaneritic Felsic Igneous Rock (Granite-Gabbro series)

Fossiliferous Limestone (Coquina)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Yellow Jasper

Cryptocrystalline quartz (SiO2) with iron inclusions

Chert (specifically Jasper)

Silicon dioxide (SiO2) with iron oxide inclusions

Gneiss (specifically a granitic gneiss cobble)

Gneiss (high-grade regional metamorphic rock)

Turquoise

Turquoise (CuAl6(PO4)4(OH)8·4H2O)

Asphalt (Bituminous Slate/Sandstone)

Asphaltum / Bituminous Rock

Kambaba Jasper

Stromatolite (Fossilized Algae)

Chert (specifically Flint or Common Chert node)

Silicon Dioxide (SiO2)

Sandstone (Ferruginous)

Ferruginous Sandstone (SiO2 with Fe2O3)

Jasper Breccia

Silicon Dioxide (SiO2) with impurities

Coquina Jasper

Fossiliferous Chalcedony (SiO2)

Conglomerate

Conglomerate (Clastic sedimentary rock)

Coral Fossil (Petrified Coral)

Scleractinia (Order) - Calcified Fossil Skeleton (CaCO3)

Gneiss (specifically a Banded Gneiss pebble)

Gneiss (High-grade Regional Metamorphic Rock)

Sandstone

Arenite (SiO2 based clastic rock)

Unakite

Epidote-Feldspar rock (specifically, a variety of granite)

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Sandstone (likely Quartzose Sandstone)

Arenite (primarily SiO2)

Banded Agate (specifically Carnelian Agate slice)

Chalcedony (cryptocrystalline variety of Quartz), SiO2

Sandstone (Pebble)

Arenite (primarily SiO2)

Strawberry Quartz

Quartz with Hematite inclusions (SiO2 + Fe2O3)

Sandstone

Arenite (primarily SiO2)

Jasper with Epidote Vein

Silicon Dioxide (SiO2) with Calcium Aluminum Iron Silicate (Ca2(Al,Fe)3(SiO4)3(OH))

Epidote

Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))

Fossiliferous Limestone (Crinoidal Limestone)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Quartz (Crystal Point/Fragment)

Silicon Dioxide (SiO2)

Yellow Jasper

Jasper (Silicon Dioxide, SiO2)

Fulgurite

Fulgurite (Lechatelierite), amorphous SiO2

Sandstone (Weathered Cobble)

Clastic Sedimentary Rock (primarily SiO2)

Quartz

Silicon Dioxide (SiO2)

Sandstone (Greywacke/Lithic Sandstone)

Arenite (composed primarily of SiO2)

Sandstone (likely Fossilized Wood or Concrete Simulacrum)

Arenite / Silicified Wood / Anthropogenic Concrete

Diabase

Diabase (also known as Dolerite)

Diorite

Intermediate plutonic igneous rock

Breccia

Clastic Breccia (SiO2/CaCO3 dominated)

Sandstone (Quartzose Sandstone Pebble)

Arenite (primarily SiO2)