Buy Indian Sunstone hearts in Australia as they are loved by many people. And the quality is higher than the thumb stones. They are more orange and more sparkly in the bright sunshine. Buy one to enjoy the tactile feel of rubbing their fingers along the surface is great. And the shape allows ease of putting these in your big pocket, on your body, or as a gift
This is an Indian sunstone smooth stone and it seems to be sun-friendly but I have not done rigorous tests. Dimensions are for the top right one.
A sunstone heart like this is said to ease phobias about the dark/enclosed spaces. It attracts fame and good luck in competition, as well as, prosperity when hidden talents uncovered. Some say it is may increase your metabolism and eases cramps. More about it on the Healing Tab.