ARKA Diamond is the ideal diamond that has attained 100% perfect reflection. The beauty of a diamond lies in the brilliance of reflecting light. It is the cut determines this brilliance. The cut of an ARKA Diamond consists of 33 faces on the upper part and 25 faces on the lower part totaling 58 surfaces. When all these 58 surfaces on the left, right, top and bottom of a diamond are polished symmetrically, the diamond reflects all light, and casts the most intense brilliance among all diamonds. The use of an optical apparatus called a fiberscope allows you to judge the quality of the diamond cut at a glance. Fig.-1 Images with a firescope Ａ. ARKA　Diamond: Perfect cut that does not let out incoming light and reflects all light. You can see wholly red, sharp and refined stars of eight arrows. B. Diamond with Conventional Ideal cut: This is a diamond that is evaluated as the highest excellent cut in the world, but reflection is not perfect and light partially leaks out.. C. Common Excellent Cut: As light does not reflect perfectly and leaks out; brilliance is not sufficient, especially on the fringe. Since the amount of light is small, red is pale, and it looks rather small in view of the carat. This type is most common in Japan. 　 There is chemistry between a diamond and a person as is true with human-to-human chemistry., which can be confirmed by the equipment called EAV (wave motion measuring equipment). Every form of matter vibrates at an atomic unit, and an ultra weak current generated from its vibration is called "active energy(気)" or "wave motion". By EAV a weak electric current of 1.25V is passed through the body to confirm whether the electric resistance at the path of the fingers is more or less than the resistance value 50 (=that represents the ideal health condition. ARKA Diamond has energy to always adjust the disturbed "active energy" to a state of the "golden mean" (the resistance value 50) in which the personﾕs natural healing ability is most realized and both mental and physical conditions are stabilized. By EAV you can choose a diamond with which you can feel most comfortable among many kinds of ARKA Diamonds. The EAV（Electro-Acupuncture according to Voll,）belongs to the medical-biological methods of measuring and is internationally practiced by physicians, which was developed by the German physician Dr..Voll about 45 years ago is based on the old, well-tried healing system of the traditional Chinese acupuncture. Dr..Voll determined that the electric resistance of the skin on an undisturbed acupuncture point comes to around 95,000ohm, that means, it is lower than the resistance in the vicinity of the acupuncture point. Physical states, rich in energy such as inflammations or allergies, lower the electric resistance; Degenerative states, poor in energy, increase it. The EAV, an accurate and sensitive measuring technique, registers integral correlations and interactions in our organism and enables us to diagnose malfunctions in a very early phrase.