What are necklaces? How can I get my villager to wear one?

Necklaces are power-ups for your villagers that are purchased with Lavastones. Once your villager is wearing one, it will stay until you spin the wheel for a different one or until they pass away. You cannot remove any necklace from a villager to put on another villager. The necklace that a villager is wearing can be replaced by spinning the wheel again.

Where is this necklace wheel?

To access the wheel, tap a villager, then tap their portrait at the lower right of the game screen. On the Villager Details screen, you will see a large gray necklace hanging below the villager's portrait. In the center of the necklace, it will say "Tap To Add Lavastone". When you tap the center of the necklace, a wheel will appear, where you have the option to spend 3 Lavastones to spin the wheel. When you tap the "Spin" button, the lavastones will be deducted and the wheel will spin. When the wheel stops spinning, the selected power-up will be added to the center of the necklace, and the necklace will be placed on your villager. If you don't like the result, you can spend lavastones to spin again!