Mineraloid

Small rounded yellow pebble, likely quartz-rich rock

Indeterminate from image; possibly iron-stained quartz or chert

Small metallic meteorite-like specimen

Unclassified iron-rich meteorite candidate; possibly an ordinary chondrite or terrestrial slag

Granite Pegmatite

Granitic Pegmatite (composition: SiO2 with KAlSi3O8)

Biotite-rich schist

Mica schist; predominantly biotite mica with quartz and feldspar

Tumbled yellow-green stone, likely serpentine

Serpentine-group minerals, commonly antigorite/lizardite (Mg₃Si₂O₅(OH)₄)

Gossan with Copper Carbonate (Chrysocolla/Malachite)

Ferruginous Oxide (Gossan) with Cu2CO3(OH)2 (Malachite) or (Cu,Al)2H2Si2O5(OH)4 (Chrysocolla)

Likely basalt or dark mafic rock fragment

Basalt; primarily plagioclase feldspar and pyroxene, commonly with olivine and iron oxides

Tumbled goldstone-like quartz pebble

Likely iron-stained quartz or jasper; exact identification requires testing

Granite

Granite (phaneitic intrusive igneous rock)

Gneiss

Gneiss (High-grade regional metamorphic rock)

Granodiorite

Granodiorite (Intermediate intrusive igneous rock)

Granite Gneiss

Felsic Gneiss (composed of Quartz, Feldspar, and Biotite)

Diorite

Diorite (Intermediate intrusive igneous rock)

Likely metallic meteorite fragment

Undetermined iron or stony-iron meteorite; mineralogy requires testing

Pale-green schist fragment

Chlorite–sericite schist, possibly containing epidote or actinolite

Limonite with Quartz

FeO(OH)·nH2O (Limonite) with SiO2 (Quartz)

Granodiorite

Granodiorite (containing Plagioclase, Quartz, and Biotite)

Granitic Gneiss

Gneiss (High-grade metamorphic rock)

Granite

Phaneritic Plutonic Felsic Rock

Granite (Fine-grained)

Phaneritic Felsic Igneous Rock

Granite

Granite (Felsic Plutonic Rock)

Granite

Phaneritic Plutonic Igneous Rock (Granite)

Granite

Phaneritic Igneous Rock (composed of quartz, alkali feldspar, and plagioclase)

Granite

Felsic Intrusive Igneous Rock

Green faceted gemstone, likely emerald

Beryl, Be₃Al₂Si₆O₁₈, colored green by chromium and/or vanadium

Amazonite-bearing feldspar (likely raw amazonite)

Amazonite, a blue-green variety of microcline feldspar; KAlSi₃O₈

Green fluorite crystal

Fluorite (calcium fluoride, CaF₂)

Quartz Pebble

Silicon Dioxide (SiO2)

Small polished pebble, likely quartz or quartzite

Undetermined; possibly quartzite (quartz, SiO₂)

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Reddish-brown crystalline rock, possibly weathered granite or garnet-bearing schist

Indeterminate; likely quartz–feldspar–mica rock with iron oxides, potentially garnet-bearing

Greenstone / River Jadeite pebble

Metavolcanic rock / Chlorite or Actinolite-rich schist

Banded gneiss cobble

Gneiss, typically quartz–feldspar–mica assemblage

Weathered greenish metamorphic rock, possibly serpentinite

Serpentinite, commonly dominated by antigorite/lizardite Mg₃Si₂O₅(OH)₄; identification is uncertain from the photograph

Blue-gray tumbled stone, likely sodalite

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂; identification is tentative from the photograph

Blue copper-mineral rock, likely chrysocolla-bearing copper ore

Chrysocolla (hydrated copper aluminosilicate), possibly with malachite, quartz, or host rock

Polished ruby-in-zoisite (anyolite), likely

Ruby-bearing zoisite: zoisite Ca₂Al₃(SiO₄)₃(OH), with corundum Al₂O₃ and commonly amphibole

Green-and-gold apatite-bearing rock, possibly epidote skarn

Apatite-group mineral, commonly fluorapatite (Ca₅(PO₄)₃F), with probable epidote and quartz; exact identification requires testing

Crushed Stone (Gravel/Aggregates)

Crushed rock aggregate (varied composition including Granite, Limestone, and Quartz)

Dark volcanic rock, likely basalt

Basalt (fine-grained mafic igneous rock; commonly plagioclase, clinopyroxene, and olivine)

Rounded basalt pebble

Basalt, a fine-grained mafic volcanic rock composed mainly of plagioclase feldspar and pyroxene, with possible olivine

Mixed mineral and shell specimen assortment

Primarily unidentified quartz-/feldspar-like pebbles with possible dark basalt or iron-rich fragments; white pieces may include shell or calcite