They aren't as intense as crystals like clear quartz or selenite, but they radiate a soft strength to ground the spirit with a sense of stability. Agate properties connect with the energy of the Earth. They are thought to bring harmony to all aspects of the being, physical, spiritual and emotional.They aren't as intense as crystals like clear quartz or selenite, but they radiate a soft strength to ground the spirit with a sense of stability. Agate properties connect with the energy of the Earth. They are thought to bring harmony to all aspects of the being, physical, spiritual and emotional.