Likely garnet crystal
Garnet-group silicate; species cannot be determined from the image
mineral
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Mineral (Biogenic)
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Yooperlite (Sodalite-bearing Syenite)
Sodalite-rich Syenite
igneous
Gneiss with Quartz Veining
Gneiss (High-grade Metamorphic Rock)
metamorphic
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Orthoclase Feldspar
Potassium aluminum silicate (KAlSi3O8)
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Potassium Feldspar (Orthoclase)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Orthoclase Feldspar with Quartz
Orthoclase (KAlSi3O8)
mineral
Banded gneiss
Foliated gneiss, likely quartz–feldspar–biotite or amphibole gneiss
metamorphic
Granitic Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Carved Sea Turtle Figurine (Aventurine / Quartz / Jasper)
Quartz variety (SiO2) / Polycrystalline Quartz Aggregate
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Dark mineral nodule with white veining
Possibly a calcite-veined manganese- or iron-rich concretion; exact identification requires testing
mineral
Sedimentary Sandstone with Iron Oxide
Ferruginous Sandstone
sedimentary
Banded Sedimentary Rock
Sedimentary rock with mineral veins/banding
sedimentary
Granite
Intrusive igneous rock
igneous
Gneiss
Gneiss
metamorphic
Geode half
Geode (often quartz/chalcedony based)
sedimentary or igneous
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz-rich pegmatite (milky quartz with feldspar)
Quartz (SiO₂)–feldspar pegmatite, likely containing albite or orthoclase
igneous
Apatite
Ca5(PO4)3(F,Cl,OH)
mineral
Likely garnet (rough, iron-rich variety)
Possibly almandine garnet, Fe₃Al₂(SiO₄)₃; image alone cannot confirm identification
mineral
Rainbow Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Apatite
Fluorapatite, Chlorapatite, and Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Likely fluorescent mineral specimen
Uncertain; possibly willemite (Zn₂SiO₄) or fluorite (CaF₂)
mineral
Hemimorphite
Hemimorphite (Zn4Si2O7(OH)2·H2O)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Serpentine (likely antigorite-rich serpentinite fragment)
Serpentine-group minerals, chiefly Mg₃Si₂O₅(OH)₄
metamorphic
Gravel and Sediment Sample
Mixed clastic sediment
sedimentary
Green serpentine-rich rock (possibly serpentinite)
Serpentinite, composed chiefly of serpentine-group minerals (e.g., lizardite, antigorite, or chrysotile)
metamorphic
Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Pink Feldspar (Orthoclase)
Orthoclase Feldspar (KAlSi3O8)
mineral
Granite
Granite, a coarse-grained intrusive felsic rock composed mainly of quartz, feldspar, and mica
igneous
Vesicular Basalt / Scoria pebble
Extrusive igneous rock with amygdaloidal infilling
igneous
Likely faceted garnet
Garnet group, commonly almandine (Fe₃Al₂(SiO₄)₃); identification from the photo is uncertain
gemstone
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
mineral
Satin Spar (Gypsum)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Limonite / Ironstone
Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O
mineral
Weathered rock pebble, possibly quartz-rich sandstone
Uncertain from the image; likely quartz-bearing sandstone with iron-oxide staining
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
mineral