Which Greek letter on the Delta Pin represents the jewels of the nine cardinal virtues?

The Greek letter that represents the jewels of the nine cardinal virtues on the Delta Pin is Sigma. In the context of Delta Sigma Theta Sorority, Inc., the Sigma signifies the importance of the values and principles that guide the organization's membership and activities. Each jewel is a representation of a cardinal virtue, reflecting the sorority's commitment to service, scholarship, and sisterhood. The other letters, such as Alpha, Delta, and Omega, have their own symbolic meanings but do not specifically denote the cardinal virtues associated with the Delta Pin. The focus on the Sigma underscores the significance of embodying these virtues in the lives of members.