Clear Quartz... known as a Master Healer", it has strong vibrations and excellent metaphysical properties. It is the most versatile among all healing stones. It is a stone of power and it amplifies any energy or intention. It protects against negativity; it helps relieve pain. It harmonizes the chakras and helps attune you to your higher self.
Tantric Twin Crystals (or soulmate crystals)- promote togetherness and help couples to work together to achieve a common goal. It attracts and holds onto true love. It covers all relationships whether romantic, family or friends.
Double-terminated crystals emit energy at both ends. It moves energy in both directions.