As stated in my previous theory book all of the Diamonds have been revealed as well as their weapons. The statues in the Sky Arena are the diamonds.
The order in the picture is-

Yellow, White, and Blue.

Yellow, as you can see matches up with the recent picture of her with only a slight difference in the hair and shoulder pad's shape like Garnet's change they got smaller.

White diamond's weapon is a long range weapon close to a spear but it seems longer. Maybe a kontos.

Blue diamond's weapon is a mace.

The broken statue(above) has a weapon in its right hand resembling a knife. But wait. It curves at the end. Like a circle. A shield! The constructors of the statue would not have the shield blocking the body of the statue so they would have the statue holding the shield facing the ground. This helps the theory of Rose being a diamond.