"Certificates of Baptism and Confirmation meant nothing to Indian converts who could not read. Bishop Hare desired to give to those who took upon themselves obligations as Christians some token that would not only mark them as communicants, but also serve as a constant reminder to them of their Christian calling. He, therefore, in 1874, designed a cross to serve this purpose. It was his custom to give a cross to each Indian candidate he confirmed, just before he made his address to the confirmation class.
In June 1975, the Niobrara Deanery during their 103rd annual Convocation, voted to share with the whole Church in the Diocese the Niobrara Cross. To this day, all confirmands receive the Niobrara Cross as a symbol of their confirmation in the Episcopal Church.
The oval in the center of the cross is the Episcopal seal of the Diocese of South Dakota. The Greek letters on the cross which quarters the oval read, "That they may have life." In each angle of the cross is a tipi surmounted by a small cross. The seal signifies that Christ has come to the Dakotas and gathered them under the protection of the Cross, that they have accepted Him, and their homes have become Christian homes."
(That They May Have Life, Virginia Driving Hawk Sneve), Diocese of South Dakota (TEC) website.
(Highlights by Northern Plains Anglicans)
By the way, if you are moved by this vision of Christ and His cross protecting your home, you might like David Ould's Bible insights here.
May God's own touch mold and shape you anew during the Triduum.