Prehnite ranges from light olive green to yellowish grass-green in color and is transparent to semi translucent. Prehnite healing crystals are said to be the crystal of unconditional love, making it the perfect healing crystal to use when working on relationships with others and also with ourselves. Prehnite is a crystal used to heal the healer. Associated with the Heart Chakra, it increases our energy and helps us to understand the situations that we find ourselves in.