Polished. Smooth. Can also be used in conjunction with paraffin treatments
The Basalt stone is the black stones, not all massage stones are equal! Basalt is the preferred stone for hot stone massage because of it's unique ability to retain heat for longer periods of time than any other type of stone. This is because natural basalt has a very high iron and magnesium content.
Our basalts are fine polished free from any chemical contamination and paraffin wax.