you dig for them & mine them
I love the Sims kingdom too and all you have to do is follow what you have to do in your missions
there are no elegant essences
Angry essences are found by running on the treadmill.
to get the rocket essences go to rocket reef and shake trees that have rocket essences.
You can usually find all essences when you pull up weeds. You will need patience but it should work.
In a place around that area.
you need the 4 raindrop essences and the gold planet essences
You need the bubble essence
there is a heart, fire, question mark, science logo, leaf, star, dirt, water drop, dew drop, moon shape, and diamond shape essencce on My sims kingdom.
Press R and you will see the list on the top screen.
go to the ski lift and use the extracator
at Forest of Elves at the pther end of the island