Antropogenic (Man Made Industrial Byproduct)

Coral Rock (Coquina)

Biogenic Limestone (Calcium Carbonate - CaCO3)

Tiny amber-colored crystal or mineral fragment

Indeterminate from image; possibly quartz, citrine, topaz, or iron-stained feldspar

Small gray rock fragment

Indeterminate; possibly quartz-rich granite, chert, or concrete-like silicate material

Quartz-lined vesicle in basalt (amygdaloidal basalt)

Amygdaloidal basalt with drusy quartz; predominantly plagioclase, pyroxene, and iron oxides

Green Fluorite

Calcium Fluoride (CaF2)

Small faceted diamond-like gemstones

Likely diamond (crystalline carbon, C), but visual identification is uncertain

Water-worn pebble, likely fine-grained volcanic rock

Unidentified mafic volcanic rock; possibly andesite or basalt

Fossil brachiopod in limestone

Brachiopoda; commonly a spiriferid or strophomenid brachiopod preserved in calcite-rich limestone

Polished ironstone concretion with quartz/iron-oxide vein

Goethite–hematite-rich ironstone concretion, likely veined by quartz or chalcedony

Milky quartz fragment

Quartz, silicon dioxide (SiO₂)

Granite

Granite (felsic intrusive igneous rock)

Sandstone (Quartzite-rich)

Clastic Sedimentary Rock (primarily SiO2)

Uncertain polymict breccia or altered volcanic rock

Likely hydrothermally altered volcanic breccia; exact mineral identification requires testing

Fossilized bone fragment

Petrified vertebrate bone; mineralized hydroxyapatite replaced or infilled by silica/carbonates

Possible ironstone concretion or weathered mineral nodule

Iron-oxide-rich concretion, likely goethite/limonite; identification uncertain from the photo

Iron-stained quartz vein rock

Quartz-rich rock with iron-oxide/hydroxide coatings (hematite/goethite); exact host rock undetermined

Fossilized bivalve shell

Paleozoic–Mesozoic bivalve fossil; commonly classified as Bivalvia indet.

Greenish altered rock, possibly serpentinite or chlorite-rich schist

Tentative: serpentine-group minerals, chiefly antigorite/lizardite, or chlorite–actinolite assemblage

Orange Calcite

Calcium Carbonate (CaCO3)

Coal

Carbonaceous sedimentary rock

Mixed polished gemstone bead bracelet, likely tourmalinated quartz and rhyolite/jasper

Quartz (SiO₂) with black tourmaline (schorl, NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄) and probable feldspar-rich rhyolite/jasper

Iron-stained quartz vein in altered host rock

Quartz (SiO₂) with iron oxides/hydroxides, likely hematite and goethite; host rock uncertain from the image

Red Jasper

Silicon dioxide (Microcrystalline Quartz, SiO2)

Quartz geode fragment (likely amethyst/citrine-bearing)

Microcrystalline and crystalline quartz, SiO₂, with possible iron staining or amethyst coloration

Chalcanthite

Hydrated copper(II) sulfate (CuSO4·5H2O)

Fossilized bivalve shell fragment

Fossil Mollusca, likely a pectinid or related bivalve; exact identification requires the other shell half and locality

Garnet fragments

Garnet-group silicate, most likely almandine–pyrope or spessartine; composition varies, commonly (Fe,Mg,Mn)₃Al₂Si₃O₁₂

Mica-bearing granite or pegmatite fragment

Quartz–feldspar rock with mica, likely muscovite; exact identification requires testing

Green Fluorite

Calcium Fluoride (CaF2)

Mixed small mineral specimens, likely quartz varieties

Uncertain from the image; translucent pieces may be quartz (SiO₂), while golden-brown pieces could be iron-stained quartz or calcite

Blue-gray mineral/rock fragment

Indeterminate; possibly azurite-bearing material, blue chalcedony, or dyed/coated stone

Fossilized leaf or plant impression in shale

Carbonized/impressed plant fossil, likely in fine-grained shale or mudstone; exact taxon indeterminate from the image

Limonite (Iron Ore)

Hydrous Iron Oxide (goethite, lepidocrocite)

Weathered iron-rich rock fragment

Indeterminate; likely limonite/goethite-bearing rock, possibly altered basalt or ironstone

Likely serpentine-rich rock (serpentinite)

Serpentinite, composed mainly of serpentine-group minerals (e.g., lizardite, antigorite, or chrysotile); exact identification is uncertain from the image alone

River Stone (Limestone)

Sedimentary Calcium Carbonate (CaCO3)

Quartz geode fragment

Microcrystalline and drusy quartz, SiO₂, likely in a weathered carbonate or volcanic host

Quartz-rich breccia or silicified rock

Microcrystalline quartz (SiO₂), with iron-oxide staining and possible feldspar/calcite fragments

Chalcedony (Agate Pebble)

Silicon Dioxide (SiO2)

Red jasper (likely brecciated jasper)

Microcrystalline quartz, SiO₂, colored mainly by iron oxides

Yellow Calcite

Calcium Carbonate (CaCO3)

Granite Cobble/Pebble

Granite