Volcanic rock hosting copper‑gold ores in the Andes.
Tin, tungsten & greisen alteration related to granites.
Double‑terminated quartz crystals from New York.
Fossil casts, gemstone spheres and rare specimens.
Scheelite glows blue‑white under shortwave UV.
Drilling results, resource updates, mine discoveries.
Petrified wood where silica replaced cells with opal.
Rediscovered gemstone, from red to cobalt blue.
Paleozoic arthropods – index fossils for geology.
Famous lamproite pipe – pink diamonds source.
Isometric, tetragonal, hexagonal – forms in minerals.
Oceanic crust slices preserved in mountain belts.
Foliated metamorphic rock with large crystals.
Interactive maps of active mining claims.
Rock salt – from Himalayan salt to chemical uses.
Evidence of ancient hurricanes in sedimentary layers.
Why gold is essential for high‑reliability circuits.
Strontium (red), barium (green) in fireworks.
How to distinguish them – inclusion & pleochroism.
Tugela Falls, South Africa – 948 m of vertical drop.
Darvaza crater and other everlasting flames.
Transparent orange opal from Querétaro.
Famous Iowa geodes with quartz and calcite.
Blue‑green copper ore, popular for cabochons.
