Amazon Games have shared the pricing for the game's premium currency, which is used in the in-game shop:
Royal Crystal Pricing (Source)
Heroes of Arkesia,
Here’s a little bit of what you can expect when the in-game shop opens up in Arkesia.
In-game store items will include cosmetic items such as unique skins, pets, mounts, and Stronghold decorations, as well as services such as guild and character name changes, appearance changes, and character slot unlocks. There will also be a limited number of consumable convenience items.
Another part of the in-game store, called “Mari’s Secret Store” offers consumables and materials. Its contents rotate every 6 hours. Players will be able to go back to previous offerings as far as the past 72 hours. Some products in the in-game store that are bought with Royal Crystals or Crystals contain random items.
Royal Crystal pricing is as follows:
Royal Crystal Pack (1,000) - $9.99
Royal Crystal Pack (2,200) - $19.99
Royal Crystal Pack (5,750) - $49.99
Royal Crystal Pack (12,000) - $99.99
While listed in USD in this post, these prices will be listed in-game at the equivalent value in your local currency.
Source: News Latest Topics https://www.icy-veins.com/forums/topic/64073-lost-ark-premium-currency-royal-crystals-real-money-prices/