When a person drinks this Essence, they are imbued with the powers and form of one of the Diamonds from Steven Universe. You have the choice between White Diamond, Yellow Diamond, Blue Diamond or Pink Diamond.
*You have the powers of an average Gem such as shapeshifting, enchanted physical capabilities fusion, a unique weapon you can summon from your gem, and immortality in addition to all the unique powers of your chosen Diamond. As you are now a non-organic being, you are also immune to things like diseases, poisons, radiation, and even lava.
*If you don't wish to be mistaken for one of the original Diamonds, you may make some slight adjustments to your form such as hairstyle, outfit and even the placement of your Gem on your physical projection. You'd still look similar enough to not be mistaken for anything other than a Diamond, but you'd be less likely to be confused for the canon Diamonds.
*Alternatively, you can choose to be only Half-Gem like Steven if you wish to remain partially organic. However you lose out on immunity to lava and radiation, and strong enough diseases or poisons can still kill you. Your physical age also becomes something you can control through your mindset, but while you're theoretically ageless because of this you can still be killed if you take sufficient damage, especially if your Gem is cracked.
*You know how to use, build, repair, and maintain all of the special technology used by Gems.
*While this does include the Kindergartens' Injectors, be advised that they are subject to the same rules displayed in the show. This means that making Gems requires environments that are abundant with natural resources, and that the process WILL drain those resources and can potentially even render an entire planet uninhabitable for organic life if the process is repeated enough times. The more powerful a specific type of Gem is, the more resources they will drain to be 'born' and the longer their 'gestation' period will be.