2D Puzzle Textures Pack
https://assetstore.unity.com/packages/2d/textures-materials/2d-puzzle-blocks-textures-140764

Simple puzzle textures for 2D games, with scripts for creating groups of blocks. Package includes 10 textures:
- ground,
- gravel,
- lava,
- water,
- sand,
- toxin,
- stone,
- dark stone,
- ice stone,
- marsh.