Green Dimond.

Everyone knows yellow, blue and pink dimond. But what about their younger sister? Green, The youngest Dimond next to pink.
She was the closet to pink and blue.
She was only a few hundred years old at the time of pinks shattering (basically a child in gem years). A few years afterwards she was introduced to home world as green Dimond.
She is know as one of the nicest Dimonds and the favourite to her subjects not just her court. She has the power to sense gems aura as well as growing vines.
What happens when she senses her sister who was long gone after 5,750 years?
This takes place in the trial episode.