There are two ways to purchase Diamonds:
Option 1: From the Home Screen
Tap the Diamond icon in the top-right corner of the screen.
You'll be taken directly to the Diamonds section of the Store.
Select the Diamond package you'd like to purchase.
Option 2: From the Store
Tap the Store icon from the main screen.
Open the Diamonds tab.
Browse the available Diamond packages and complete your purchase.
Diamonds can be used to purchase a variety of items throughout the game, including Chests, Energy Refills, and Store refreshes.