Everyone take a minute to bask in the cullinary genius that is Purple Diamond.
Gem powers include:
Sedative esc aura. Can temporarily put a gem to sleep with her diamond aura. Uses it on herself a lot but mainly keeps her first pearl asleep as if she shatters during it, at least she would'nt be in any pain.
Purple deals with cooking for any "organic" leaning creatures on Nebulan, whether that is actual inhabitants of the planet, or hybrid gems that do rely on their organic halves for energy.
She owns over 200 establishments and her court mainly consists of employees for said cafes, bakerys, etc. Though some work on crop harvesting with Green Diamond's court. (Those two are very close, their courts rely on eachother to maintain the planet's inhabitants.)
Fresh crops (either from harvesting off of plant gems or regular crops) like carrots, corn, etc get delivered to these places (or are delivered to inhabitants of the planet who can eat them.) Seaweed, Kelp, oysters, and shellfish are considered luxuries given that Aqua Aura Diamond has to manually approve of shipment of such items as those need special handling in order to avoid spoilage. (Aqua rules an underwater kingdom on Nebulan, she's responsible for tending to/researching Nebulan's aquatic life. She mainly ships edible aquatic plants to the surface for Purple's court to use. Fish with high mercury content are avoided.)
Purple's first pearl (sleeping on the cloud) became unable to walk due to an "incident" that happened 10000 years ago. She was effected with a deadly version of Smokey Diamond's aura (can either act as a fast acting poison, slow decay of the gem's energy inside and out, or be an aphrodesiac. Whatever mood she's in.) Her gem is slowly running out of it's ability to take in light. (Hence why she can't walk anymore, it's gotten really bad.)