In short, diamonds represent faithfulness, love, purity, innocence, and relationships filled with love. It removes certain types of deviations in the aura, which can be best imagined as sort of voids, and diamond fills them with the pure energy of love. It inspires creativity, ingenuity, inventivity, faith, endurance, and helps in manifesting abundance in all areas of life. Diamond is a symbol of the richness of the Self. As the hardest mineral of all, it is especially esteemed owing to its beauty, purity, and ability to reflect light in a special manner. Diamond brings purity, and clear positive resolution of all problems that bother us, especially after we have become willing to admit our wrong perceptions and approaches, or our unreal expectations. Diamonds work together with other crystals in accentuating their vibratory, healing qualities and can be used for example in crystal healing therapy.
The Hindu tradition relates diamonds to the planet Venus, while some other ancient peoples believed that they are connected to the planet Mars. The later is probably due to the warriors' custom of wearing diamond stones in battle for protection and strength. It was thought that diamonds make the warriors invincible and that they fortify their muscles. In favor of this thesis speaks the Greek word for diamond - adamas - which means invincible. 

The diamonds have been called kings of all crystals, stones of the mind and gemstones of the masters. This is no doubt, the most powerful crystal imaginable in the domain of metaphysics. It is able of reaching deep into us and opening much more spiritual doors than any other stone. Even more than that, diamond is able to bring abundance and fulfillment of the desires or undertaking you can only dare to imagine. If you dare to dream your own and true destiny, diamond is here to help you accomplish it. 

In meditation, as a stone of the intellect, it helps the mind to detach itself from the unwanted and unnecessary thoughts, bringing mental clarity to where it is most needed. Indeed, the picture of a perfect brilliant diamond was often used in the meditative practices of different spiritual traditions for thousands of years. 

Diamond activates the seventh crown chakra Sahasrara. It unites the body with the mind, and is able to help prevent cardiovascular diseases. It can stimulate the glands of the endocrine system, and help in cases such as leukemia and skeletal problems. It can enhance sight, and help balance the metabolism. It is believed to be able to heal capillary bleeding. Diamond gives an increased power to help resist addiction, especially if related to increased food intake, and cigarets. 

Due to its metaphysical features, there is no need to internally purify or do crystal charging of diamonds. So indeed, I hope you have realized what the meaning of diamonds is and how powerful they are in sense of their metaphysical, healing and spiritual properties. The price of the natural gemstones is high, but their benefits can also be substantial if you know how to properly use them in healing, meditation, and crystals programming.