Livanna Crystal
From The Stargate Omnipedia
A holy relic that once sat in a monastery devoted to Grannus. Brother Caius believed it was stolen by Vala Mal Doran, as it disappeared during one of her previous visits.
KEY EPISODE
The Ties That Bind - During SG-1's visit to the monastery, Brother Caius tells Vala of the loss of the Livanna Crystal.