Deo 36 Pieces Assorted Sizes Massage Stone Set DESCRIPTION: This 36 Pieces assorted sizes massage stone setare natural basalt without the addition of chemical waxes or coatings. They will turn black once they are oiled. Basalt that is suitable for hot stone massage is normally grey. Although natural black basalt does exist, it is extremely rare for it to be suitable for hot stone massage as it is generally much too grainy. Because people see black basalt massage stones (which is how they look, and remain, after they have been oiled for the first time) an expectation has developed that this is how they should be when you buy them. This has lead some manufacturers to use chemical waxes or coatings to give grey basalt a black appearance. This has the additional downside of making the stones lose the natural “grippiness” they have with the connective tissue and this slipperiness makes them less effective when used to massage the body. FEATURES: 8 Large flat ovular basalt (4 for backside, 4 for thigh) 14 Medium flat ovular basalt (4 for arm, 2 for palm-rest, 4 for calf, 2 for feet, 2 for neck) 6 Small flat ovular basalt (2 for forehead, 2 for head crown, 2 for hindbrain) 8 Toes (8 for feet) stylish bamboo storage case