This is an Alpha Delta Pi sorority Mother's pin featuring a diamond shape with a central violet flower and Greek lettering.

The estimated market value for this Alpha Delta Pi Sorority Mother's Pin typically ranges from $15 to $50 for a standard gold-plated version. 

The exact secondary resale value depends heavily on the metal content and construction:

• Gold-Plated Base Metal: Usually resells on platforms like eBay or Etsy for $15 to $35. Retail brand new from official providers like HJGreek is approximately $22.