Ruby Gemstone Soap Ruby Gemstone Soap is a bright fragrant soap for any type of skin with the oils of watermelon, almond and cinnamon. It gently moisturises and nourishes the skin, helping to maintain a natural glow. Ruby Gemstone Soap is a replica of the real stone, reproduced in a high quality soap. You can also buy this bright gemstone soap in the sets ?Äö Secrets of Arabia 4 and Secrets of Arabia 7.