I read that "in ancient Greece, jury members would cast a white stone to signify an acquittal, whereas a black stone proclaimed the defendant guilty."
Perhaps some insight for Rev.2:17. Our redemption is more than mere aquittal, rather now personalized by way of relationship with the Father. That's the "hidden manna", the true essence of Christ, as reflected uniquely by each believer.
Imagine a God so inexhaustible that a piece of that Being could be assigned to each person, such that if fully lived out, each time one meets a believer, he/she meets a piece (sic) of God that passes all understanding. A pinch of the larger loaf!
"Whoever has ears, let them hear what the Spirit says to the churches. To the one who is victorious, I will give some of the hidden manna. I will also give that person a white stone with a new name written on it, known only to the one who receives it."
Revelation 2:17 NIV