Magnesia does not tend to fracture or fall apart given its fibrous composition, and responds nicely to repeated resurfacing.
Charcoal simply can’t compete. But charcoal provides a reducing atmosphere and reflects heat in a way that is extremely beneficial
when working in sterling silver and for operations such as fusing and fabricating large cabochon bezels.
This Magnesia Soldering Block is made from a Lightweight, non-asbestos fireproof material, soft enough to pin objects onto the surface for perfect soldering.