Coquina (Limestone)
Bioclastic Limestone (CaCO3)
sedimentary
Quartzite with inclusions
Quartzite
metamorphic
Limonite Concretion
Limonite (Hydrated Iron Oxide) FeO(OH)·nH2O
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pumice
Pumice (a highly vesicular amorphous silicate glass)
igneous
Chert (Beach Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite Cobble
Quartzite (composed primarily of SiO2)
metamorphic
Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Puddingstone (Conglomerate)
Conglomerate (clastic sedimentary rock)
sedimentary
Polygenetic Conglomerate (Puddingstone)
Conglomerate (SiO2 matrix with mixed clasts)
sedimentary
Quartz Vein in Metamorphic Rock
Silicon Dioxide (SiO2) within Metasedimentary host
metamorphic
Fossilized Solitary Rugose Coral
Order Rugosa (commonly Horn Coral)
sedimentary
Gabbro (Water-Worn Cobble)
Gabbro
igneous
Chert (Chalcedony/Agate)
Microcrystalline Quartz (SiO2)
sedimentary
Siltstone
Siltstone
sedimentary
Porphyritic Rhyolite
Rhyolite (Porphyritic)
igneous
Septarian Nodule
Septarian Concretion (CaCO3 + CaMg(CO3)2)
sedimentary
Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Granodiorite
Phaneritic Granodiorite
igneous
Red Jasper
Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Greenschist
Greenschist (Chlorite-actinolite schist)
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Amethyst Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Flint Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Porphyritic Basalt
Amygdaloidal Porphyritic Basalt
igneous
Porphyritic Basalt (River Rock)
Porphyritic Basalt
igneous
Red Granite
Granite (Felsic Plutonic Rock)
igneous
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Basalt with inclusion
Basalt (Aphanitic-Porphyritic texture)
igneous
Garnetiferous Quartzite (Garnet Gneiss Pebble)
Garnet-bearing Quartzite or Quartz-Feldspar Gneiss
metamorphic
Basalt
Basalt
igneous
Quartzite
Quartzite (primarily SiO2)
metamorphic
Fossiliferous Chert with Brachiopod Impression
Chert (SiO2) containing Brachiopoda fossil remains
sedimentary
Petrified Dinosaur Bone (Gembone)
Agatized Dinosaur Bone
sedimentary
Fossiliferous Limestone with Brachiopod shell
Calcium carbonate (CaCO3)
sedimentary
Coquina
Bioclastic Limestone
sedimentary