Can you please add a default crafting material for your ToolMaterials please?
Forge adds a field you can put an item (called 'customCraftingMaterial') so other modders don't have to hardcode a bunch of integration.

https://github.com/Glitchfiend/BiomesOPlenty/blob/BOP-1.7.10-2.1.x/src/main/java/biomesoplenty/common/core/BOPItems.java#L51

https://github.com/Glitchfiend/BiomesOPlenty/blob/BOP-1.7.10-2.1.x/src/main/java/biomesoplenty/common/core/BOPItems.java#L54

Thanks in advance

I can certainly do this for mud, however amethyst uses metadata which Forge (for whatever reason) doesn't appear to support

Then it seems like we should make a pr to forge -_-

Closing this for now as I have done as much as I can with it at this point given what is available in Forge.