Mineral

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Weathered granite

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

Banded gneiss

Foliated gneiss, likely quartz–feldspar–biotite or amphibole gneiss

Granitic Gneiss

Gneiss (Metamorphic Rock)

Carved Sea Turtle Figurine (Aventurine / Quartz / Jasper)

Quartz variety (SiO2) / Polycrystalline Quartz Aggregate

Rounded mixed-grain river pebble, likely granitic rock

Granite (tentative; exact rock type cannot be confirmed from the photograph)

Likely garnet (rough, iron-rich variety)

Possibly almandine garnet, Fe₃Al₂(SiO₄)₃; image alone cannot confirm identification

Granite

Intrusive igneous rock

Gneiss

Gneiss

Rainbow Fluorite

Calcium Fluoride (CaF2)

Fluorite

Calcium Fluoride (CaF2)

Apatite

Fluorapatite, Chlorapatite, and Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))

Serpentinite (probable)

Serpentinite, a rock composed chiefly of serpentine-group minerals such as antigorite, lizardite, or chrysotile

Green serpentine-rich rock (possibly serpentinite)

Serpentinite, composed chiefly of serpentine-group minerals (e.g., lizardite, antigorite, or chrysotile)

Dark mineral nodule with white veining

Possibly a calcite-veined manganese- or iron-rich concretion; exact identification requires testing

Geode half

Geode (often quartz/chalcedony based)

Quartz-rich pegmatite (milky quartz with feldspar)

Quartz (SiO₂)–feldspar pegmatite, likely containing albite or orthoclase

Potassium Feldspar

Orthoclase (KAlSi3O8)

Pink Feldspar (Orthoclase)

Orthoclase Feldspar (KAlSi3O8)

Hemimorphite

Hemimorphite (Zn4Si2O7(OH)2·H2O)

Serpentine (likely antigorite-rich serpentinite fragment)

Serpentine-group minerals, chiefly Mg₃Si₂O₅(OH)₄

Apatite

Ca5(PO4)3(F,Cl,OH)

Small dark pebble, likely a fine-grained metamorphic rock

Undetermined; possibly slate or amphibolite

Gravel and Sediment Sample

Mixed clastic sediment

Satin Spar (Gypsum)

Calcium Sulfate Dihydrate (CaSO4·2H2O)

Limonite / Ironstone

Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Likely fluorescent mineral specimen

Uncertain; possibly willemite (Zn₂SiO₄) or fluorite (CaF₂)

Green copper-bearing rock, possibly chrysocolla-bearing matrix

Undetermined copper-mineralized rock; green areas may include chrysocolla, malachite, or chlorite

Blue goldstone (man-made glass)

Copper-bearing aventurine glass; synthetic silicate glass

Likely faceted garnet

Garnet group, commonly almandine (Fe₃Al₂(SiO₄)₃); identification from the photo is uncertain

Blue Apatite

Ca5(PO4)3(F,Cl,OH)

Weathered banded gneiss (probable)

Foliated quartz–feldspar gneiss; exact minerals cannot be confirmed from the image

Native Copper

Copper (Cu)

Yellow Ochre / Limonite

Hydrated ferric oxide (FeO(OH)·nH2O)

Rhodochrosite

Manganese Carbonate (MnCO3)

Vesicular Basalt / Scoria pebble

Extrusive igneous rock with amygdaloidal infilling

Quartz-rich rock, likely granite or quartz-bearing metamorphic rock

Undetermined; possibly granitic rock composed mainly of quartz and feldspar, with mica or other dark minerals

Granite

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

Hematite

Iron(III) oxide (Fe2O3)

Weathered rock pebble, possibly quartz-rich sandstone

Uncertain from the image; likely quartz-bearing sandstone with iron-oxide staining

Quartz–feldspar–mica rock, possibly pegmatite

Coarse-grained granitic rock (compositionally granitic pegmatite); exact identification requires closer examination