[OOC] Return to the Rusty Rat

[Toot]

Adamantine, as its name suggests, is hard as diamond and that's all. Its DR bypass is not supernatural and a construct's DR 15/admt isn't supernatural either. So if it comes to "fantasy" there are two possibilities: either "it's magic" or "it's not historical". Admt definitely falls in the latter category. Defying physics definitely falls in the former.

EDIT: another proposal. Adamantine works through anything with hardness less than 20 without any effort. In this case, Torin's adamantine full plate cuts through floor like knife through butter. Even when the dwarf is inside. Means he has to keep treading as if it were a body of water. non-Newtonian fluid. If he stops he sinks.
The good side is that he wouldn't risk being damaged by the process since he's not made of wood.
He would never suffer falling damage either since he would never stop falling until he would hit adamantine or would reach the gravitational center of the planet.
Unless of course this is a magical world with no gravitational pull at all.

Once again I feel like I have to say, I totally agree that as the DM you have the final word.  There was a post where you asked for opinions so this is what I'm doing.  So please no one take offense. 

Under Adamantine it specifically states, "Weapons fashioned from adamantine have a natural ability to bypass hardness when sundering weapons or attacking objects, ignoring hardness less than 20."   Adamantine only gives armor damage reduction.  So he couldn't use his armor to dig through stone.  

Lugar brings up a good point about creatures made from stone or iron.  Players have never had to check to see if their weapons break when fighting these creatures so why suddenly are we checking to see if they break when they hit inanimate objects made from the same material?  

Regarding how well an Adamantine weapon could cut through dense materials: Stone has 8 hardness and iron has 10 hardness.  So lets say you use an iron axe against wood (hardness 5).  Iron is double the hardness of wood so iron cuts through wood fairly easily. Adamantine (hardness 20) is more than double the hardness of stone so it is fairly reasonable (at least to me) to say a that an Adamantine ax can cut through stone much like Iron cuts through wood.  It's true a Morning star is not a slashing weapon but like a pick ax it is a piercing weapon which is used to penetrate stone.  Would the Morning star work just as good, likely not.  But that doesn't mean the spikes wouldn't penetrate the stone repeatedly until finally it breaks apart.  Just like an ice pick does when you pick away at ice.   

Regarding the wooden handle:  As a weaponsmith who actually created his mace with his own two hands, Torin would have known what purpose he had for the morning star [Breaking stuff] and knew he would need a stronger handle.  So he could have reinforced the Haft of the weapon a number of ways to resist breaking during its creation, including making it out of iron.