Tip of a Stalactite drips both lava and water if the upper Pointed Dripstone is waterlogged and the base of of the Stalactite is lava
Set up: A 2-block tall Stalactite. The stalactite is below a lava source. The upper Pointed Dripstone is waterlogged.
Result: The Pointed Dripstone at the tip starts dripping both lava and water.