Mineral (Processed Alloy)

Galena-bearing ore

Galena (lead sulfide, PbS), likely with sphalerite and sulfide gangue

Basalt with Large Augite Phenocrysts

Porphyritic Basalt (containing Ca(Mg,Fe,Al)(Al,Si)2O6)

Iron Meteorite Fragment

Siderite (Geological term for iron meteorite class - Fe/Ni alloy)

Brown Jasper (Likely)

Jasper (Cryptocrystalline Silicon Dioxide - SiO2)

Galena

Galena (lead sulfide, PbS)

Galena-bearing ore (tentative)

Galena, lead sulfide (PbS), likely in a quartz/carbonate-rich matrix

Likely iron-rich meteorite or hematite-rich rock

Uncertain; possible iron meteorite (Fe–Ni alloy) or limonite/goethite-bearing hematite

Orange Calcite

Calcium Carbonate (CaCO3)

Azurite with native copper

Azurite (Cu₃(CO₃)₂(OH)₂) with native copper (Cu)

Petrified Wood

Silicified wood (SiO2)

Green Quartz

Silicon Dioxide (SiO2)

Rock Specimen

Unclassified rock specimen

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)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (with probable host rock)

Silicon Dioxide (SiO2)

N/A - Image is non-geological

Acrylonitrile Butadiene Styrene (ABS) or Polypropylene (PP)

Small brown mineral or rock fragment

Undetermined; the image does not show enough detail for reliable identification

Small brown mineral fragment (undetermined)

Unidentified; image detail is insufficient for a reliable species identification

Mica Schist / Granite

Mica Schist (Silicate metamorphic rock)

Angular gray rock fragments

Unidentified fine-grained rock; the image does not show diagnostic features sufficient for a specific identification

Petrified Wood

Silicified wood (Quartz replacement)

Copper ore-bearing rock (likely malachite/chrysocolla in a sulfide-rich matrix)

Cuprite–malachite/chrysocolla mineralization; probable copper sulfides such as chalcopyrite in altered host rock

Small stone fragments

Undetermined; the image does not show enough detail for a reliable identification

Small dark mineral fragment

Undetermined; image lacks diagnostic detail for reliable identification

Possible iron-rich pebble with a weathered inclusion

Unidentified; image alone does not support a reliable mineral or rock identification

Pallasite Meteorite

Pallasite (Stony-iron meteorite; Fe-Ni alloy with (Mg,Fe)2SiO4 olivine)

Quartz Pebble

Silicon Dioxide (SiO2)

Unidentified rough rock fragment

Undetermined; the image does not show enough diagnostic detail for a reliable rock identification

Small brown mineral or rock fragment (not identifiable from the image)

Undetermined; the specimen is too small and lacks visible diagnostic features for reliable identification

Small brown mineral or rock fragment

Undetermined; the image lacks enough detail for a reliable identification

Quartz pebble

Silicon dioxide (SiO2)