Screenshots of Pro Game Guides
There are quite a few Pokémon that need Ice to evolve, such as Eevee (Glaceon Castle) and Alolan Vulpix. Claim # 83: Snow-White Vulpix in the Snow. But Ice Stones are not common and they cost 1,000 Virtues in the Item Exchange Shop in Jubilife Village. Luckily, there’s a free way to evolve your Ice-type Pokémon — and that’s by investigating Ice in Alabaster Icelands.
Ice Rock is located in one of the underground caves in Bonechill waste. Enter the big hole in the snow (marked with a Pokéball on our map below) and head south. The rock is our current location. It’s just a few corridors away!
All but what you have to do Survey it and open your bag. You will see an evolution prompt.
This is an unproven part, but we’ve noticed that you can’t use Ice Rock’s power for a while after using it to evolve a Pokémon once. It can be reused after a few expeditions.
For more help with Pokémon Legend: Arceuswe at Pro Game Guides will help you.
https://progameguides.com/pokemon-legends-arceus/where-to-find-the-ice-rock-in-pokemon-legends-arceus/ Where to find Ice Rock in Pokémon Legends: Arceus