Items with the same characteristics will transmute into each other when crafted or moved to other inventories

When an item is moved into an inventory, either from picking it up from a crafting table or moving it into a box, if that item has characteristics, but not stats, that match an existing item in the destination inventory, the first item will be transmuted and stack with the item in the destination inventory.

For example, if you have a durable cloth made of Sheliak cloth and a Sheliak and Beelzeboar lining in your inventory, and you craft a durable cloth made of Sheliak cloth and a Beelzeboar/Beelzeboar lining, you will receive another durable cloth with 24% crit and 12% melee damage that will stack with your existing durable cloth in your inventory instead of receiving a new stack of durable cloth with 12% crit and 24% melee damage.