Kathy, The hardness of your pretty pink stone is 6-7. As some may not
know, it’s a variety of the mineral zoisite–the better known variety
being tanzanite, which I always thought should be called “heat-treated
brown zoisite,” which nearly all of it has been. Another beautiful
variety is “ruby in zoisite,” in which the rubies contrast with a
beautiful green zoisite. But then, I’m sure you knew all this.
Gary Strickland, GJG