If you are a OnePlus fan, you might remember that the Chinese company used Sandstone material on its OnePlus One and OnePlus 2 smartphones. Well, now it looks like the OnePlus 5T could get a Sandstone variant as well.
The company recently published a video - called What's in the Box? - which shows random people touching/holding a OnePlus product kept in a closed box, and speculating what is it.
As you can see, guesses range from "smooth," "grippy," textured", "like stone," to even something as straight forward as "OnePlus One Sandstone." So while there's no information to back this, it's still reasonable to believe we could see a Sandstone OnePlus 5T.