Seven pinkish stone beads that look like the walls of Jerusalem. Seven pearls in between them. Seven being the number of completion. God rested on the 7th day. We now as the Eclessia are the living stones.
1 Peter 2:5 (NIV)
you also, like living stones, are being built into a spiritual house[a] to be a holy priesthood, offering spiritual sacrifices acceptable to God through Jesus Christ.