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You need 4 obsidian - 4 tnt and a block of diamond
OTO
TDT
OTO
Put that in a normal crafting table and it gives you a piece of paper with the recipe on.
Put that recipe in a Craftpacket Stamper (no power required) to make the Diamond Shards (18 of)
i had the exact same problem, solved it by starting a new save, pulling the ingrediants crafting table and stamper from nei, crafted the packet, stamped it then loaded my main save where the recipe then worked, hope it helps
i had the exact same problem, solved it by starting a new save, pulling the ingrediants crafting table and stamper from nei, crafted the packet, stamped it then loaded my main save where the recipe then worked, hope it helps