The Eye of God

Toward the Middle of Era-1, a deep space rescue ship operated by the Tardigrades discovered a huge gemstone-quality diamond in deep space.  Measuring over 100 Meters in diameter, this diamond was more of a landmark than a treasure.  It was placed into a public museum by the Planetary League Astrophysical Survey, and the popular media gave it the name "The Eye of God". 

Over the years several attempts were made to steal the diamond.  Occasionally these were successful, but generally not for long, as hiding such a large stone proved nearly impossible.  Occasionally, the thieves would succeed in carving off pieces of the stone, but the bulk of it remained intact.

During the Great Reckoning, the Holy Empire of Man confiscated the Eye of God, and it went into the Emperor's personal treasury at Beta Pictoris.

During Era-3, the Eye of God was once again put on public display by the Galactic Republic.