Sedimentary Or Igneous Fragment

Chert

Microcrystalline Quartz (SiO2)

Sedimentary Rock Fragments

Clastic Sedimentary Rock

Magnetite (Iron Ore)

Magnetite (Fe3O4)

Basalt

Basalt (Extrusive Igneous Rock)

Pyrite

Iron Sulfide (FeS2)

Likely weathered granite or granitic gneiss fragment

Granite; mainly quartz, feldspar, and mica

River Pebble

Quartzo-feldspathic rock fragment

Pebble (likely Limestone or Siltstone)

Lithic fragment (calcareous or siliciclastic)

Pebble (likely Sandstone or Granitic Pebble)

Clastic Sediment (or specific rock type, e.g., Arenite, Granitoid Pebble)

Limestone (specifically a Crushed Aggregate fragment)

Calcium Carbonate (CaCO3)

Quartz (Smoky/Milky variety)

Silicon Dioxide (SiO2)

Smoky Quartz and Chalcedony Geode Fragment

Silicon Dioxide (SiO2)

Vesicular basalt (likely scoria)

Mafic volcanic rock; predominantly plagioclase, pyroxene, and volcanic glass, with possible olivine

Quartz

Silicon Dioxide (SiO2)

Shale and Pebble Fragment

Sedimentary Rock (Mudstone/Shale with Silica Pebble)

Quartz (Common Quartz/Citrine-toned)

Silicon Dioxide (SiO2)

Chert (Arrowhead Fragment)

Microcrystalline Quartz (SiO2)

Fossilized tooth, likely a mammalian tooth fragment

Indeterminate fossil tooth; possibly an ungulate or carnivoran tooth

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Tumbled citrine or iron-stained quartz

Quartz (SiO₂), likely iron-oxide-stained or natural citrine

Likely weathered granite or granitic fragment

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

Orbicular Granite

Orbicular Granidiorite / Plutonic Igneous Rock

Gneiss

Foliated Metamorphic Rock

Green Fluorite

Calcium Fluoride (CaF2)

Weathered carbonate rock, possibly fossiliferous limestone

Calcite-rich limestone (CaCO₃), tentative identification

Likely pale limestone or calcite-rich rock

Calcite-bearing limestone; chiefly calcium carbonate (CaCO₃)

Chalky limestone

Micritic calcite limestone; predominantly CaCO₃

Fossilized Shell Fragment

Bivalvia or Gastropoda (Class) fragment

Tumbled smoky quartz

Quartz (SiO₂), smoky variety

Clear Quartz

SiO2 (Silicon Dioxide)

Quartz

Silicon Dioxide (SiO2)

Quartz Crystal Fragment

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Chert (Jasper/Common Opal mix)

Microcrystalline Quartz (SiO2)

Weathered brown rock, likely iron-stained sandstone or chert

Indeterminate; probable quartz-rich sandstone/chert with iron-oxide staining

Quartz Vein / Milky Quartz

Silicon Dioxide (SiO2)

Basalt with Granite Inclusions (Xenolith)

Mafic Igneous Rock (Basalt) with Felsic Igneous Inclusion (Granite)

Weathered granite (likely biotite granite)

Granite; interlocking quartz, feldspar, and mica, commonly with biotite

Weathered pink granite fragment

Granite, chiefly quartz, potassium feldspar, and plagioclase feldspar with minor mica

Weathered sandstone

Quartz-rich clastic sandstone, commonly arkosic or feldspathic

Specular Hematite

Hematite (Fe2O3)

Quartz (Rock Crystal)

Silicon Dioxide (SiO2)