Rose petals

Rose petals is an item used for unlocking old and new Valentine's rewards. Players can talk to the Lady Niya or Evil Niya in Burthorpe for more information.

It is obtained by doing various activities and skills throughout RuneScape; such as Treasure Hunter and completing a daily challenge. When obtained through skilling and killing, small amounts ranging from 2-6 are obtained.

Rose petals can be worn in the pocket slot, thus reducing the need for an inventory space, unless another pocket item is desired. When more are obtained, they will spawn in your pocket slot if there's already an equipped stack (even if there's a second stack in your inventory. The exception being from a daily challenge.) The option to wear them is a right click option, as left click opens the rewards interface.

Trivia

 * Although the item was only officially released on 12 February 2015, it had originally appeared on the Grand Exchange on 2 February.
 * Claiming the pendants from the previous event would be already depleted of bonus experience.