Coquina
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Category
Organic Structure (Not A Rock)
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Unakite
Epidotized Granite
metamorphic
Quartzite with Quartz Veins
Metamorphic Quartz-rich Rock (SiO2)
metamorphic
Quartz Vein in Hematitic Siltstone
Hydrothermal Quartz (SiO2) in Ferriferous Matrix
metamorphic
Red Sandstone
Ferruginous Sandstone (SiO2 with Fe2O3)
sedimentary
Sandstone Pebble
Sedimentary Rock (Quartzose Sandstone)
sedimentary
Basalt
Extrusive igneous rock
igneous
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Pearl
Pearl (Calcium Carbonate with organic conchiolin, CaCO3)
mineral
Fancy Jasper
Silicon Dioxide (SiO2) with iron and organic inclusions
sedimentary
Banded Chert (Flint/Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Petrified Coral (Agatized Coral)
Anthozoa (Agatized Fossil)
sedimentary
Sandstone (Wonderstone)
Arenite (composed primarily of SiO2 with Fe2O3 impurities)
sedimentary
Quartz (Milky/Crystalline)
Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified Wood (primarily SiO2 - Silicon Dioxide)
sedimentary
Basalt with Quartz Veining
Veined Basalt (composed primarily of plagioclase feldspar, pyroxene, and olivine with quartz/calcite infill)
igneous
Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
Porphyritic Basalt (Drill Core)
Porphyritic Basalt with Plagioclase Phenocrysts
igneous
Basalt with Calcite Veins
Basalt (containing CaCO3 inclusions)
igneous
Druzy Quartz on Sandstone
Silicon Dioxide (SiO2) with Quartz Crystals on Clastic Sedimentary Rock
sedimentary
Granite
Felsic intrusive igneous rock
igneous
Red Amber (Burmite/Cherry Amber)
Succinite / Retinite (Organic Fossilized Resin, C10H16O)
Mineraloid (Organic)
Basalt with Quartz Veining
Mafic Igneous Rock (primarily Plagioclase and Pyroxene) with SiO2 inclusions
igneous
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 oxides)
sedimentary
Olivine Diabase (Microgabbro)
Diabase or Dolerite with Olivine
igneous
Chert (often called Flint when found in chalk/limestone)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Granite Pebble
Granite (Phaneritic intrusive igneous rock)
igneous
Granite
Granite (Phaneritic igneous rock composed of Quartz, Feldspar, and Mica)
igneous
Sandstone
Clastic Sedimentary Rock
sedimentary
Schist
Mica Schist (contains muscovite/biotite and quartz)
metamorphic
Vesicular Basalt with Quartz/Chalcedony
Vesicular Basalt (primarily Plagioclase, Pyroxene, and Olivine with SiO2 infill)
igneous
Snowflake Obsidian
Volcanic Glass (SiO2) with Cristobalite inclusions
igneous
Basalt Pebble
Basalt
igneous
Carved Mottled Greenish-Yellow Crystal/Glass Object
Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.
Man-made Object/Uncertain Mineral
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Moonstone
Orthoclase (Potassium Aluminum Silicate), Formula: (K,Na)AlSi3O8
mineral
Granite
Phaneritic Felsic Igneous Rock
igneous
Granite
Phaneritic Igneous Rock (Granite)
igneous
Red Sandstone Pebble
Sedimentary Quartz Arenite / Arkose
sedimentary
Red Sandstone
Quartz Arenite (iron-stained) / SiO2
sedimentary
Shark Tooth Fossil
Otodus sp. (possibly Cretalamna)
fossil