Rocks & natural glass.

Lapis lazuli ↗

Rock / aggregate

Lapis lazuli is a blue rock rather than one mineral species. White calcite areas and tiny gold-colored pyrite flecks may sit beside the blue material, making each polished surface a small map of its mineral mixture.

Unakite ↗

Rock / aggregate

Unakite combines pink feldspar, green epidote and quartz in a mottled rock. Each polished piece is a small map of the mixture rather than one uniform mineral.

Petrified wood ↗

Fossil / mineralized material

Petrified wood preserves evidence of wood structure through mineralization. Silicified examples can combine recognizable grain with the polish of a silica-rich stone.

Dalmatian stone ↗

Rock / trade name

Dalmatian stone is a cream-colored spotted decorative rock often marketed as dalmatian jasper. Its pattern is memorable, while the trade name can conceal its actual mineral mixture.

Shungite ↗

Carbon-rich rock / material name

Shungite is carbon-rich geological material with variable mineral content, not a single species with a fixed formula. Fullerene content is sample-dependent; the name is not proof of electromagnetic protection or drinking-water safety.

Moldavite ↗

Natural impact glass / tektite

Moldavite is terrestrial impact glass, not a fragment of a meteorite. Green color and an etched surface can be imitated; bubbles or surface texture alone do not authenticate a specimen.