Quartz crystals are commonly found as rock crystals. These can manifest in various colors such as Citrine (yellow), Rose quartz (pink) and Amethyst (purple). Clear Quartz is the most powerful healing and energy amplifier on the planet. They are known for their electromagnetic properties and used to balance the body’s electromagnetic frequencies. Also used to amplify and enhance the body’s energy and thus, the thinking process. Natural Quartz crystals are said to enhance one’s spiritual growth and is often used in prayer beads. A person should wear one to enhance his spiritual growth as well as source of comfort during stress.
It is also said to improve one’s natural ability to fight diseases as well as resistance to change and mental adaptability.
Crystal is related to planet "Venus" and hence it can be used as a substitute of Diamond.
Please note that natural crystals, unlike man-made crystals, may have blemishes, uneven textures and colors, inclusions or internal fractures in them. These are not flaws and are perfectly fine in the context of Astrology.