Known for
Basaltic lavas of the Lebombo range, coal-bearing sediments, and decorative stones including banded agates and jasper in regional trade.
Stone notes
- Volcanic rocks: Basalt and related igneous rocks are prominent in the east (Lebombo), often weathering to iron-rich soils.
- Agate & jasper: Silica-rich nodules and banded chalcedony appear in southern African collecting and lapidary markets.
- Field ID tip: Look for conchoidal fracture and waxy luster in chalcedony; check for banding under good light.
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