Metamorphic (Likely Gneiss Or Schist Based On Texture)

Granite (Worn Pebble)

Granite

Likely pink feldspar-rich granite or pegmatite

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

Vesicular Basalt / Scoria pebble

Extrusive igneous rock with amygdaloidal infilling

Milky quartz

Quartz (silicon dioxide, SiO₂)

Granite

Granite (Phaneritic igneous rock)

Granite Pebble

Granite (Phaneritic intrusive igneous rock consisting of Quartz, Alkali Feldspar, and Plagioclase)

Desert Rose Fragment (Atypical) / Weathered Chert

Silicon Dioxide (SiO2) or Barium Sulfate (BaSO4) depending on exact mineralogy

Fossil tooth, possibly shark tooth

Indeterminate fossilized vertebrate tooth; likely a shark tooth (possibly *Carcharhinus* or related genus)

Greenstone / Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Epidosite with Quartz (Unakite-variant or Jasper)

Epidotized Metasomatite

Sandstone (Ferruginous)

Arenite with Iron Oxide matrix

Yellow Topaz

Al2SiO4(F,OH)2

Fossilized Shark Tooth

Elasmobranchii fossil (likely Odontaspididae family)

Granite (possibly granitic gneiss)

Felsic plutonic rock dominated by quartz, K-feldspar, plagioclase, biotite and/or hornblende

Basalt Porphyry

Porphyritic Basalt

Chert (Chalcedony)

Cryptocrystalline Quartz (SiO2)

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Porphyritic Basalt (Porphyry)

Porphyritic Basalt

Basalt Pebble with Vesicles

Vesicular Basalt

Lapis Lazuli (Low-grade/Calcite-heavy)

Na8[Al6Si6O24]n(S,Cl,SO4,OH)2 (Lazurite component)

Small pale mineral fragment

Unidentified; possibly quartz, calcite, or feldspar

Chert (Iron-stained)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

River Cobble (Sandstone)

Arenite (primarily SiO2)

Milky Quartz (Common Quartz)

Quartz (Silicon Dioxide, SiO2)

Granite / Gneiss (Coarse-Grained Felsic Rock)

Granite (Quartz-Feldspar-Mica aggregate)

Feldspar-rich Quartzite

Meta-arkose (Quartz-Feldspar Quartzite)

Quartzite

Quartzite (primarily SiO2)

Quartzite Pebble

Quartzite (primarily SiO2)

Asphalt (Bituminous Concrete)

Bituminous mix containing aggregates and petroleum-based binder (CnH2n+2)

Marble

Marble (metamorphosed limestone/dolostone). Predominantly composed of Calcite (CaCO3) for marble derived from limestone, or Dolomite (CaMg(CO3)2) for marble derived from dolostone.

Basalt with Vesicles

Vesicular Basalt

Granite Pebble

Granite

Granite

Felsic Plutonic Rock (primarily SiO2)

Epidote

Epidote (Ca2(Al, Fe)3(SiO4)3(OH))

Epidote (Greenstone)

Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))

Greenstone (likely serpentinite or greenstone pebble)

Serpentinite-rich ultramafic rock; commonly dominated by serpentine-group minerals, with possible chlorite, actinolite, or magnetite

Quartzite Pebble

Quartzite (primarily SiO2)

Fossilized Brachiopod Shell

Order Spiriferida (likely)

Fossil Shark Tooth

Otodus sp. or Carcharocles sp. (likely fossilized Chondrichthyes)

Amethyst and Calcite collection

Silicon Dioxide (SiO2) and Calcium Carbonate (CaCO3)

Polished orbicular granite

Granite, chiefly quartz, alkali feldspar, plagioclase, and biotite/amphibole

Sandstone (with Iron Staining)

Arenite (Silicon Dioxide, SiO2, often with iron oxides like Limonite)