on the island of gust in the northwestern see.
wind temple
the ice temple is on the isle of frost
the hourglass itself
Legend of Zelda 1-First Temple Phantom Hourglass- Temple of ICE Oracle of Seasons-Explorer's Crypt.
go to the temple of courage
Do the rest of the temple obviously.
you go into the temple of fire and its there
you get it in the temple of courage at modlia island
its in the last temple for the pure metal
in the ice temple on frozen island
In the temple
In the temple on Goron Island