(4th Heart Chakra) These are lovely green Vivianite crystals, gem grade.  Vivianite is about all issues of love.  It offers a warm, glowing energy that many users find to be "very pulsating".  I find this crystal to be quick acting and very potent.  Some like to use this stone for not only issues of love, but also as a crystal for goal setting.  A good choice for you over achievers!  Vivianite is also good to enhance ones memory, stop forgetting where you placed those car keys!  This crystal on the physical level increases assimilation of iron into the blood stream.  Also a good treatment for degeneration of the iris of the eye.  Vibrates to the number 3.