The Malteser Shape Stone is highly polished to provide a smooth comfortable use on the body during hot massage. This unique shape enables gentle or intense pressure to be applied in the smaller areas of the body such as around the joints. Dimension of dia.1.8" x 0.8" is perfect to be hold in your palm. Basalt rock is originally found deep within a volcano where it remains for hundreds of millions of years, gaining all of its natural properties. All Basalt is rich with iron and magnesium, which make this stone very effective in massage treatments. Basalt is excellent for holding heat for long periods of time and has very low radiation which makes this rock a much more healthy and beneficial stone for use. We use natural Black Basalt rock as the only material, all stones were shaped and polished by traditional handcraft, no wax, dyestuff, chemicals were applied during the production. 10 pieces per pack.