Amethyst Deciever (Laccaria amethystina)
The Amethyst Deceiver is a very stunning violet mushroom, and it can be found in various woodland environments around Europe, Asia, and the Americas. They prefer to be close to beech or oak. These mushrooms are small with a convex to flattened cap and a tough fibrous stem. They tend to start out as a light lilac/purple and eventually fading to brown.
Amethyst Deciever is indeed edible but, with how it changes color throughout any weather changes and the season, it can be difficult to properly identify, hence the name "Deceiver". Look a-likes include Lilac Firecaps and some various types of Webcaps with similar coloring.
They can be used in many recipes. With keeping it's vibrant purple color even after cooking, it can help liven up dishes!