Our Delta Kappa Brothers may be interested in this post. I have recently acquired what I believe to be an original Delta Kappa member badge, from when the fraternity was known as Tri-Kappa, or Kappa Kappa Kappa (Founded in 1920). Remember, Tri-Kappa changed their name to Delta Kappa because of the inaccurate and unwarranted association with the Ku Klux Klan.
As you can see from the image, the triangular badge is surrounded by 9 seed pearls…3 on each side. Each set flanked by a red stone (ruby?) and one red stone in the center (7 total). There are three 5-pointed stars in the form of a delta surrounding the badge.
The badge comes from an original owner in the North-east, where Tri-Kappa was founded and there is still one surviving Chapter at Ithaca.