Sedimentary Or Igneous Fragment

Weathered vesicular basalt (probable volcanic bomb)

Basalt, primarily plagioclase feldspar, pyroxene, and olivine

Fossiliferous limestone (likely crinoidal or shell limestone)

Calcite-rich limestone; predominantly CaCO₃, with visible fossil fragments

Quartz (Small Grains)

Silicon Dioxide (SiO2)

Quartz-rich pegmatite (possibly tourmaline-bearing)

Granitic pegmatite; chiefly quartz (SiO₂), feldspar, and dark mica/amphibole

Quartz on Matrix

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Grey River Pebble (Greywacke / Basalt)

Stream-rounded silicate rock pebble

Unidentifiable embedded dark fragment

Indeterminate; possibly a dark silicate mineral or lithic inclusion

Quartz Pebble

Silicon Dioxide (SiO2)

Fossilized tooth or bone fragment

Indeterminate fossil; possibly a small fossil tooth or mineralized bone, exact identification requires microscopy

Milky quartz (rough quartz fragment)

Quartz, silicon dioxide (SiO₂)

Conglomerate

Conglomerate (SiO2 matrix with various silicate clasts)

Quartz (Clear/White)

Silicon Dioxide (SiO2)

Pebble

Lithified rock fragment / Sedimentary clast

River Pebble

Polished Rock Fragment

Milky Quartz

Quartz (SiO2)

Small brown quartz-rich pebble, possibly chert or jasper

Microcrystalline quartz (SiO₂), tentative

Likely weathered granite or granitic pegmatite

Granite; chiefly quartz (SiO₂), feldspar, and mica

Quartz Pebble

Silicon Dioxide (SiO2)

Small weathered stone, possibly quartz-rich granite or feldspar

Indeterminate granitoid fragment; likely quartz (SiO₂) and feldspar, with minor mica or iron oxides

Likely quartz-bearing rock fragment

Quartz (SiO₂), possibly with calcite or feldspar

Weathered limestone or calcareous tufa

Calcite-rich carbonate rock, primarily CaCO₃ (often micritic limestone or travertine/tufa)

Polygenetic Conglomerate (or Breccia)

Clastic Sedimentary Rock

Weathered chert or silicified limestone nodule

Microcrystalline quartz (SiO₂), possibly replacing limestone; exact identification requires testing

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

Milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Weathered quartz- or feldspar-rich rock fragment

Indeterminate light-colored silicate rock; possibly quartz or feldspar in a granitic fragment

Dark gray-blue stone fragment

Unidentified fine-grained rock; the image is insufficient for a reliable species-level identification

Small gray rock fragment

Unidentified rock; the image lacks enough detail for reliable mineral identification

Dark rock fragment, possibly basalt

Unidentified mafic volcanic rock; basalt is a tentative visual identification

Weathered quartz-rich rock fragment

Likely quartz–feldspar-rich granitoid, possibly granite or granitic gneiss; exact identification is uncertain from the image

Gray stone fragment

Unidentified fine-grained gray rock; exact identification is not possible from the image

Likely basalt or another dark, fine-grained volcanic rock

Basalt (tentative; composition cannot be confirmed from the image)

Granite fragment

Granite, a coarse-grained felsic intrusive igneous rock composed mainly of quartz and feldspar

Dark gray, fine-grained rock fragment (possibly basalt)

Basalt (tentative identification; image alone cannot confirm)

Granite fragment

Granite

Coquina or Fossiliferous Sandstone

Fossiliferous Calcarenite (CaCO3 with SiO2 inclusions)

Quartz (Milky or Clear Quartz fragment)

Silicon Dioxide (SiO2)

Coquina or Fossilized Shell Fragment

Calcium Carbonate (CaCO3) / Biogenic Limestone

Tumbled or naturally broken quartz crystal

Quartz (silicon dioxide, SiO₂)

Banded Agate / Shell Fossil Fragment

Silicon Dioxide (SiO2) / Calcium Carbonate (CaCO3)

River Rock

Sedimentary clast