What are the names of limestone islands in Fiji?

Viti Levu-one of the four big island
Vanua Levu-second largest island
Taveuni-third largest island
Kandavu-fourth largest island
Beqa-you can see this island from the city centre
Levuka-where the first capital city was.
Ovalau-an island west of Levuka
Rabi-inhabitants of this island are of Kiribati descents, often called the Banabans.
Rotuma-an island North of Fiji, where the inhabitants are polynesians
Nananu-I-Ra-this island is where the movie castaway was shot.