Diamonds, the birthstone for the month of April are and always have been one of the most precious and desired stones since the dawn of time. Made up of pressurized carbon that has been under the earth for thousands of years, diamonds are the hardest substance on earth. Diamonds are associated with happiness and wealth, and are typically considered a good investment that grows in value over the years. Often used as engagement rings throughout the world, this stems from the belief that the ring finger which is typically used for the engagement ring contains the vein of love that flows directly to the heart. Once considered as protection against evil and poison by the ancient Greeks, diamonds are also associated with the planet Venus the planet of love and beauty.