The set includes 4622 craft resource icons.
There are transparent PNG.
256×256 pixels size.

The set includes:

Bone;
Books;
Cloth;
Gem;
Herbs;
Leather;
Metal;
Monster Parts;
Package;
Rune;
Scrolls;
Stone;
Tool;
Wood.

Check out the details and buy a license from the Unity Asset Store: https://assetstore.unity.com/packages/2d/gui/icons/rpg-craft-resources-224629