1. Continental Islands: Minicoy, Seven Islands of Bombay (Bombay is the present-day Mumbai.), Sundarbans, Amindivi, etc.
2. Volcanic Island: Barren island part of Andaman and Nicobar Islands.
3. Coral Island: Andaman and Nicobar, Gulf of Kutch, Gulf of Mannar, Lakshadweep, Tarkarli in Malvan, etc.