if (event.getState().getBlock() == Blocks.STONE)
        {

                ListIterator<ItemStack> drops = event.getDrops().listIterator();
                while(drops.hasNext())
                    {
                    ItemStack element = drops.next();
                    if(element.getItem() == Item.getItemFromBlock(Blocks.COBBLESTONE))
                        {
                        event.getDrops().add(new ItemStack(ModItems.stone, 4));
                        event.getDrops().add(new ItemStack(ModItems.gravel, 1));
                        drops.remove();
                        }

                    Utils.getLogger().info(element);

                    if(element.getItem() == Item.getByNameOrId("tile.stone@1"))
                    {
                    event.getDrops().add(new ItemStack(Items.DIAMOND, 4));
                    drops.remove();
                    }

                    }


        }