Zelda help plz

I'm playing Zelda:PH, i have ten Power Gem but i don't know what to do with them. Could you help me out?

You will have to go to an island to enhance you powers with the power gems.I forgot the islands name :-[

Find a secret island between a circle of 3 stones on your sea chart. Its on the south-west island I think.Spirit Island or something

What the sea chart: southern right?

South west is down and to the left...Go there to find a hidden Island with the three rocks surrounding it like eden2812 was saying.

now you've found 10 of them, the tough thing is to find the twenty you need to max out the power. most likely you'll max out the power gems without anyones help...