Christian Cross Pendant Necklace

Very nice stone cross with a center accent of a 4-point antique gold embellishment piece affixed. Four oat-shaped creamy Ivory colored stone beads are shown off to be a perfect compliment. I've added a gold metal colored 21 inch chain. I will need to ask other Poshmark members to help identify the stone that this cross is made of...and, if you happen to know the answer, please comment. Thank you.