Prehnite- Both a heart and solar plexus stone. Most associated with the bright green in colour but it can also range from colourless to grey to yellow, yellow/green or white, semi transparent to translucent. Considered a stone of unconditional love, said to heal the healer. Helps to bring peace and joy and relieves worry. It can act as a pain reliever, particularly for arthritis sufferers, and in some cases appears to reverse the condition to some extent.