Actinolite is a mineral that can be found in a variety of colors, including green, black, and brown. It has a Mohs hardness of 5-6, making it relatively soft.
Actinolite is sometimes confused with another mineral called amphibole, but the two can be distinguished by their difference in cleavage. Actinolite typically forms in metamorphic rocks, and it is often used as a gemstone. It is also believed to have healing properties, and it is sometimes used in crystal therapy.
Actinolite can be found in many parts of the world, including Canada, Brazil, and Australia.