Minerals

Gneiss

Gneiss

Gneiss

Gneiss

Diorite (Salt and Pepper Rock)

Diorite

Gneiss

Gneiss

Gneiss (Banded Gneiss)

Gneiss

Quartz-rich pegmatite with black tourmaline

Granitic pegmatite composed chiefly of quartz, with black tourmaline (schorl); possibly feldspar

Likely copper-bearing rock (oxidized copper ore)

Unidentified copper minerals, possibly malachite and cuprite; the image is insufficient for a precise identification

Gneiss

Metamorphic Foliated Gneiss

Quartz-rich Diorite

Diorite (Phaneritic intermediate igneous rock)

Gneiss

Gneiss

Granodiorite

Granodiorite

Gneiss (High-grade Metamorphic Rock)

Gneiss

Granite

Granite (compositionally: Quartz, Alkali Feldspar, and Plagioclase)

Green glassy slag or manufactured glass bead

Noncrystalline silicate glass; likely industrial glass/slag, not a true mineral

Banded Gneiss

Gneiss (Metamorphic rock composed of feldspar, quartz, and mica)

Gneiss

Gneiss

Quartz-rich pegmatite (likely mica-bearing granite)

Granitic pegmatite; chiefly quartz (SiO₂), feldspar, and mica (muscovite/biotite)

Dark green mineral specimen, possibly serpentine or epidote

Tentatively serpentine-group mineral, Mg₃Si₂O₅(OH)₄, or epidote, Ca₂(Al,Fe)₃Si₃O₁₂(OH)

Vesicular basalt (likely iron-rich volcanic rock)

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

Vesicular basalt

Basalt, commonly plagioclase feldspar + pyroxene ± olivine

Rock Specimen

Unclassified rock specimen

Lapis Lazuli

Na6Ca2(Al6Si6O24)(S,SO4,Cl)1-2 (primarily containing Lazurite with inclusions of Calcite and Pyrite)

Quartz pebble

Silicon dioxide (SiO2)

White quartz pebble

Quartz (silicon dioxide, SiO₂)

Quartz-rich rock fragment, possibly milky quartz or quartzite

Quartz (SiO₂), likely with minor iron-oxide or feldspar staining

Tumbled quartz-rich pebble

Quartz (SiO₂), possibly iron-stained milky quartz or quartzite

Quartz pebble

Silicon dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Greenstone

Metabasalt / Chlorite Schist

Fossilized Vertebra

Chordata fossil (Vertebra)

Tree Agate

Silicon dioxide (SiO2)

Likely rough quartz-rich rock (identification uncertain)

Possibly milky quartz with iron-oxide staining; exact identification is not possible from the image alone.

Milky quartz

Quartz (SiO₂), likely massive milky quartz

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Greenstone

Metabasalt (Greenstone)

Quartz Pebble

Silicon Dioxide (SiO2)

Weathered basalt pebble

Basalt, a fine-grained mafic volcanic rock; likely olivine- and pyroxene-bearing

Limonite

FeO(OH)•nH2O

Limonite

FeO(OH)•nH2O

Limonite

FeO(OH)·nH2O