Coral Dust

Coral dust is an item that is either converted by Sara at the Beach with 5 refined corals, or a random drop from mutant woopa. It is used for several quests, most notably Kulin's Quest.

How to obtain coral dust
By killing the monsters at the Beach, you will obtain either small coral or red coral. You can also kill mutant woopa, as they alone drop coral dust.
 * 10 small coral will make a red coral
 * 5 red coral will make a refined coral
 * 5 refined coral will make 1 coral dust