This place has 300 gems and 6 fireflies. It is one of the three home places.
At the beginning when you go past the portal to Shamrock Isle, Bianca will be there. Talk to her and she will give you a firefly.
You can find Hunter near some sheep. After explaining about fodder, he will also give you a firefly.
Bianca is next to a Ice Power Gate. After explaining about it, she will give you another firefly.
Hunter is on top of a set of (technically) stairs. After a bit of jumping practice, he will give you a firefly. The rare 25 gem is also here, also the portal to Country Farms.
You will need fire breath here (obtained at Country Farms). You need to flame each one so that they have a little sun floating above them. There are eight of them.
There is a roaming firefly just below the set of stairs.