Aventurine has been used by humans for millions of years.
It is a unique form of quartz, and particles of chrome give it a green colour. Other forms of aventurine may contain a wide variety of mineral particles, which lead to a range of different colours.
Some varieties contain minerals that give it silver, brown, or occasionally red colours, although the green variety is the most common, and the one that this article will primarily discuss.
Many people use tumbled stones in crystal healing, color therapy, or other types of alternative medicine. The stones are placed on the body where discomfort occurs or on “spiritual centers” known as “chakras.” Green aventurine is often used to represent the fourth, or heart, chakra.