Gold-filled and blue enamel pin from, I believe, The American Dance Therapy Association, in the shape of a triangle. The pin has a deep blue enamel background with lettering and border in gold.
This ADTA pin is in excellent original condition and is marked gold filled with a hallmark I can't make out. It has an older style safety clasp and measures 1/2 x 1/2 x 1/2 inches.