Mineral, Sediment

Slate

Slate; fine-grained metamorphosed shale, commonly mica- and chlorite-rich

Shark Tooth Fossil

Elasmobranchii dentition (fossilized)

Fossilized Shark Tooth

Fossilized elasmobranch tooth (Apatite/Calcium Phosphate)

Pyrite Concretion (Grapestone)

Iron Sulfide (FeS2) Concretion

Banded mica schist

Mica schist, chiefly muscovite/biotite with quartz and feldspar

Quartz Pebble (Yellow Quartz / Quartzite Pebble)

Silicon Dioxide (SiO2)

Fossilized Shark Tooth (Megalodon or Carcharocles species fragment)

Otodus megalodon / Carcharocles spp. (Apatite / Calcium Phosphate)

Rounded sandstone pebble

Quartz-rich sandstone, likely arkose or quartz arenite

Bivalve Fossil

Bivalvia (Phylum Mollusca)

Fossilized scallop shell

Bivalve shell, likely a scallop (family Pectinidae); shell composed chiefly of calcite and/or aragonite (CaCO₃)

Fossil coral limestone

Fossilized colonial coral, commonly Favosites or related tabulate coral, preserved in calcite (CaCO₃)

Sandstone (Banded)

Arenite (primarily SiO2)

Concretion

Septarian or Siderite Concretion

Limitation Concretion

Ironstone Concretion (Goethite/Limonite)

Concretion

Sedimentary Concretion (Ironstone / Calcite Concretion)

Likely fossilized shell or carbonate concretion

Indeterminate biogenic calcium carbonate, commonly calcite (CaCO₃)

Sandstone (likely Arkosic or Lithic)

Clastic Sedimentary Rock (composed mostly of SiO2)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Petrified Wood

Silicified Wood (SiO2)

Concretion (Sandstone)

Sandstone Concretion

Sandstone Concretion

Sedimentary Concretion (SiO2 or CaCO3 cemented)

Green Slate or Metamorphic Rock

Metamorphic rock (chlorite/actinolite-bearing)

Likely quartz fragment

Quartz (silicon dioxide, SiO₂)

Tumbled white quartz

Quartz (silicon dioxide, SiO₂), likely milky quartz

Fossilized Shark Tooth

Fossilised Chondrichthyes dental specimen (likely Otodus or Carcharias sp.)

Banded Sandstone

Quartz Arenite (with iron oxide banding)

Polished fossil shell fragment (likely ammonite or bivalve)

Fossilized mollusk shell; likely aragonite/calcite replaced by silica or iron-rich minerals

Weathered iron-rich rock or concretion

Likely limonite/goethite-bearing concretion; exact identification requires testing

Fossil shark tooth

Likely a fossilized shark tooth, possibly Carcharhinus or a related requiem shark; exact species is indeterminate from the image.

Phantom Quartz (Chlorite Inclusion)

Silicon Dioxide (SiO2) with Chlorite (Mg,Fe,Al)6(Si,Al)4O10(OH)8

Yellow Ochre / Limonite

Limonite (FeO(OH)·nH2O)

Wishing Stone (Basalt/Siltstone with Quartz/Calcite vein)

Carbonaceous Siltstone with Quartz (SiO2) or Calcite (CaCO3) vein

Rounded greenish volcanic pebble, likely andesite

Fine-grained andesite (tentative; exact identification requires closer examination)

Rounded ironstone concretion

Iron-rich sedimentary concretion, commonly composed of goethite and/or hematite cementing sand or clay

Weathered brown stone, likely sandstone or mudstone

Indeterminate clastic sedimentary rock; likely quartz-rich sandstone or lithified mudstone

Muscovite Mica

KAl2(AlSi3O10)(OH)2

Fossilized bivalve or brachiopod shell

Mineralized carbonate shell, commonly calcite (CaCO₃); exact taxon indeterminate from image

Fossilized bivalve shell

Fossil mollusk, likely an oyster or similar bivalve; original shell composed of calcium carbonate (aragonite/calcite)

Tumbled jasper (likely picture jasper or iron-rich jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides

Tumbled quartz pebble

Quartz (silicon dioxide, SiO₂), likely milky or smoky quartz

Quartz pebble (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Likely milky quartz pebble

Quartz (silicon dioxide, SiO₂)