Sedimentary Rock (Possibly Composed Of Various Minerals)

Chalk (Limestone variant)

Calcium Carbonate (CaCO3)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Gravel or Pebble

Clastic Sedimentary Grain (typically composed of Quartz or Silicate minerals)

Green Aventurine and Clear Quartz

Aventurine (variety of Quartz - SiO2) and Quartz (SiO2)

River Rocks (Black)

Various lithologies (e.g., basalt, chert, obsidian for black varieties), mechanically rounded clasts

Sulfur on Aragonite

Sulfur (S) on Aragonite (CaCO3)

Likely weathered limestone or calcite-rich stone

Limestone, primarily calcium carbonate (CaCO₃), possibly calcite

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Green Jasper

Silicon Dioxide (SiO2) with impurities

Jasper

Microcrystalline Quartz (SiO2)

Sulfur (with Matrix)

Native Sulfur (S8)

Septarian Nodule

Septarian Concretion (Composition: Calcite, Aragonite, and Limestone/Clay)

Jasper

Microcrystalline Quartz (SiO2)

Chert / Flint

Silicon Dioxide (SiO2)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Basalt with Vesicle/Vug

Basalt (Aphanitic Mafic Igneous Rock)

Likely pink feldspar-rich granite or pegmatite

Granite/pegmatite; primarily quartz (SiO₂), alkali feldspar (KAlSi₃O₈), and plagioclase feldspar

Milky Quartz

Silicon Dioxide (SiO2)

Coquina

Bioclastic Limestone (composed primarily of CaCO3)

Que Sera Stone (Llanite / Blue Quartz with Feldspar and Iron Oxides)

Porphyritic Rhyolite (Quartz-Feldspar Porphyry)

Conglomerate

Sedimentary Conglomerate

Apatite

Fluorapatite, Chlorapatite, and Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))

Weathered quartz-rich stone, possibly chalcedony or calcite

Likely microcrystalline quartz (SiO₂) or calcite (CaCO₃); exact identification requires testing

Granite or Granitic Gneiss

Granitoid / Gneiss

Granite

Phaneritic Acidic Igneous Rock (composed of Quartz, Alkali Feldspar, and Plagioclase)

Weathered sandstone

Quartz-rich clastic sandstone, likely iron-oxide-stained

Quartz Druzy (Geode Fragment)

Silicon Dioxide (SiO2)

Granite or Granodiorite (weathered fieldstone)

Granitoid

Vesicular basalt (likely amygdaloidal basalt)

Basalt, a mafic volcanic rock composed mainly of plagioclase feldspar, clinopyroxene, and commonly olivine; vesicles are partly mineral-filled amygdules.

Tumbled red jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

Limestone

Calcite-rich sedimentary rock (CaCO3)

Almandine Garnet in Matrix

Almandine (Fe3Al2(SiO4)3)

Ferruginous Quartz

Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)

Vein-bearing sandstone or quartzite cobble

Quartz-rich sandstone with white quartz veins; possibly metamorphosed to quartzite

Concrete / Conglomerate (Man-made)

Artificial Conglomerate (Cementitious Composite)

Rainbow Fluorite

Fluorite (Calcium Fluoride, CaF2)

Serpentinite

Serpentinite (composed primarily of minerals in the Serpentine group: Chrysotile, Lizardite, and Antigorite)

Sandstone (Ferruginous)

Ferruginous Sandstone (SiO2 with Fe2O3/FeO(OH) cement)

Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Limonite (Ochreous Sandstone)

Hydrous ferric oxides (FeO(OH)qnH2O)

Emerald (or possibly Green Glass / Slag)

Beryl (Be3Al2(SiO3)6)