Coquina
Biogenic Limestone (CaCO3)
sedimentary
Category
Man Made Rock (Technosol)
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Lapis Lazuli
Lapis Lazuli (a rock, not a single mineral; primary mineral is Lazurite (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2
Metamorphic rock
Slate
Slate (Foliated Metamorphic Rock)
metamorphic
Sandstone
Arenite (siliciclastic sedimentary rock composed mostly of quartz)
sedimentary
Polished blue calcite sphere (tentative identification)
Calcite, CaCO₃; blue color generally results from trace impurities or inclusions
mineral
Pink Granite (Alkali-feldspar Granite)
Felsic intrusive igneous rock (composition: KAlSi3O8, SiO2, NaAlSi3O8)
igneous
Sandstone
Arenite (SiO2 principal)
sedimentary
Quartzite
Quartzite (Metamorphic Quartz Sandstone)
metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Snowflake Obsidian
Volcanic glass with Cristobalite inclusions (70–75% SiO2)
igneous
Beach Pebble (Chalcedony / Chert)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Granodiorite with Quartz Veining
Granodiorite (containing Plagioclase Feldspar, Quartz, and Biotite/Hornblende) with Quartz (SiO2) veins
igneous
Sandstone (specifically Arkose or Quartz Arenite)
Arenite (primarily SiO2 with possible Feldspar)
sedimentary
Coquina / Fossiliferous Limestone
Calcareous bioclastic sedimentary rock (CaCO3)
sedimentary
Granite Pebble
Felsic intrusive igneous rock
igneous
Limestone
Calcareous sedimentary rock (CaCO3)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3)
sedimentary
Banded Sandstone
Arenite with Liesegang banding
sedimentary
Granite
Felsic intrusive igneous rock
igneous
Granite
Granite (Phaneritic Quartz-Feldspar intrusive rock)
Igneous
Petoskey Stone
Hexagonaria percarinata (Fossilized Coral)
sedimentary
Diamond (in a gold ring)
Diamond (pure carbon, C)
mineral
Man-made Green Quartz (Lab-grown or Treated)
Silicon Dioxide (SiO2) with artificial coloration
mineral
Granite
Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)
igneous
Granodiorite
Granodiorite
igneous
Banded Chert (River Stone)
Silicon Dioxide (SiO2)
sedimentary
Chert (Chert / Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Sandstone (likely Quartzose Sandstone)
Arenite
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Diorite
Diorite (Plagioclase feldspar and amphibole/biotite)
igneous
Swirled Agate Bead
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite
sedimentary
Likely blue glass or synthetic gemstone jewelry
Uncertain; possibly synthetic spinel, cubic zirconia, or blue glass
gemstone
Riverstone (Sandstone Pebble)
Arenite (SiO2 with various lithic fragments)
sedimentary
Chert (Flint)
Microcrystalline quartz (SiO2)
sedimentary
Limestone
Sedimentary Rock (Primarily CaCO3)
sedimentary
Granite
Phaneritic Felsic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Diamond
Carbon (C)
gemstone
Granite
Phaneritic Igneous Rock (primarily SiO2, Al2O3, K2O, Na2O)
igneous