We feel a quickened heartbeat in our chest when we see a loved one walk through our front door after months of separation, to a drop in our heart when we hear terrible news. There is a clear connection between the physical sensations of our body and the emotions that arise in response to the world.
This clear, real connection, between the feeling in our 'hearts' when we experience emotion is why greenstone heart shapes are given to express our feelings. Give them to those you care for, those with 'big hearts.' People who are selfless individuals that deserve to be reminded that your life and the lives of those around you, are better off with them in it.