Red jasper is specially good for balancing sacral chakra, it gives inner peace, power, vitality and security. It bears the energy of the Great Mother. Helps to relieve pain, specially menstruation pain. Together with clear quartz and magnesite it helps to balance and lessen body weight (if worn at the same time).
Flat stone suits the best for healingwork, because it covers the chakra and the contact surface are is the largest. Also it will not fall off the body and is large enough to draw forth energetic and physical changes. Flat stones are also the best to carry in your pocket.