Vintage Phi Mu 10k Black Onyx Necklace

Vintage Phi Mu 10k yellow gold and black onyx diamond shaped necklace. The pendant is stamped 10k and has engraving on the back. Engraving reads:

"Katherine Louise Schraud   Outstanding Pledge   1959" 

Comes on its original 18 inch chain.

Diamond-shaped pendant measures: 1.06 inches tall x 0.6 inches wide