The hammers are based on vanilla pickaxes, that is, they will only be able to crush the materials that these pickaxes can break, for example, the wooden hammer will not be able to break the diamond.
Hammers work correctly with the Fortune, Silk Touch and Unbreaking enchantments!

CRAFTS 

Hammer crafts are based on the crafting of vanilla minecraft tools, obviously with the exception of emerald and amethyst hammers, which do not have vanilla tools for these minerals.