craftingTable.addShaped("gem_of_rpg", <item:steampunkrpg_content:gem_of_rpg>, [
    [<item:minecraft:diamond>, <item:minecraft:ender_pearl>, <item:minecraft:diamond>],
    [<item:quest_token_api:quest_token>, <item:minecraft:enchanted_golden_apple>, <item:steampunkrpg_contracts:empty_contract>],
    [<item:voidscape:voidic_crystal>, <item:minecraft:totem_of_undying>, <item:voidscape:voidic_crystal>]
]);