Looks like God liked pretty rocks too... :)
I would be curious of the origin sources for these stones. If they were imported from mines in the area around Israel or Jordan it could make a direct Biblical Christian connection to these tombs found in Turkey. Even if none of the other artifacts are related to trade and interaction with Christian cultures. Be hard to deny where they came from.
I hope they do a follow up with more research on where these stones originated from. :)
The article you posted listed the locations of some long-term mines in Egypt, Afghanistan and other locations. Long distance trade back then was amazing.