Minerals

Gneiss or Schist

Gneiss or Mica Schist with Garnet

Unidentified pink-and-gray mineral or rock specimen

Undetermined; the image is too blurry for reliable identification

Chrysocolla and Malachite Beads

Hydrated copper silicates (Chrysocolla) and Copper carbonate hydroxide (Malachite)

Small brown mineral fragment (undetermined)

Unidentified; image detail is insufficient for a reliable species identification

Rounded pink-gray granite pebble

Granite, a coarse-grained felsic intrusive igneous rock

Small turquoise-colored mineral fragment (possibly turquoise; identification uncertain)

Possibly turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; the image does not show enough detail to confirm

Weathered feldspar-rich pegmatite (likely orthoclase or plagioclase)

Granitic pegmatite; predominantly K-feldspar/plagioclase (KAlSi₃O₈–NaAlSi₃O₈), with quartz and dark mafic minerals

Quartz-rich pegmatite (milky quartz with feldspar)

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

Blue-green rough mineral specimen (identity uncertain)

Undetermined; the image is insufficient for a reliable mineral identification

Lepidolite

K(Li,Al)3(Al,Si,4)10(O,F,OH)2

Quartz-rich pegmatite

Granitic pegmatite, composed mainly of quartz and feldspar with dark mica or other accessory minerals

Clear quartz crystal (tentative)

Quartz, silicon dioxide (SiO₂)

Gneiss

Gneiss

Tumbled quartz pebble, likely iron-stained milky quartz

Quartz (SiO₂), possibly with iron-oxide staining

Gneiss

Gneiss

Gneiss

Gneiss (High-grade metamorphic rock)

Soil with Mineral Detritus and Quartz Fragments

Regolith / Silicate Mineral Aggregate

Tumbled quartz-rich pebble (likely quartzite or vein quartz)

Quartz (SiO₂), possibly quartzite with minor iron-oxide staining

Gneiss

Gneiss (Metamorphic Rock)

Quartz pebble

Silicon dioxide (SiO2)

Quartz pebble

Silicon dioxide (SiO2)

Quartz pebble

Silicon dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz pebble

Silicon dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Likely quartz pebble

Quartz, SiO₂

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz pebble

Silicon dioxide (SiO2)

Quartz pebble

Silicon dioxide (SiO2)

Granite

Granite (composed of Quartz, Feldspar, and Mica)

Serpentinite

Serpentinite, composed mainly of serpentine-group minerals (approximately Mg₃Si₂O₅(OH)₄)

Amygdaloidal Basalt

Mafic extrusive igneous rock with secondary mineral infills

Polished granite or gneiss stone

Granite, chiefly quartz, feldspar, and dark mica/amphibole; exact identification is uncertain from the photograph

Potassium Feldspar (Orthoclase)

Orthoclase (KAlSi3O8)

Weathered copper-bearing rock, possibly chrysocolla-bearing quartz or host rock

Indeterminate from the photo; possible chrysocolla (hydrated copper silicate) with quartz or other host minerals

Likely chlorite schist

Chlorite-rich schist; chiefly chlorite with possible quartz and mica

Granite

Granite (Phaneritic intrusive igneous rock)

Gneiss (specifically Banded Gneiss)

Gneiss

Weathered mica-rich schist (likely muscovite schist)

Muscovite–quartz schist; chiefly muscovite mica and quartz, with possible feldspar and iron-bearing minerals

Gneiss

Gneiss (foliated metamorphic rock)

Granite with Mafic Xenolith

Intrusive Igneous Rock (Felsic to Intermediate)