Magnetism of Hematite Cylinders: Laser Carving & Effects

[rdnyisaac]

Scenario:
You have a small, magnetized, cylinder-shaped hematite. The positive pole is on top and the negative pole is on the bottom. You took a laser to carve a new, smaller cylinder. After you're done carving, you are left with a smaller cylinder and a ring.

Here are my questions:

Will the laser mess with the poles?

If it doesn't mess with the poles, what would happen it you pickup the small cylinder now?

 

[Drakkith]

As long as the hematite isn't heated past a certain point it should retain it's magnetism after being carved. Both the cylinder and ring should still be magnetic with the poles aligned in the same direction.

 

[rdnyisaac]

Would it be possibly safe to use a laser without the magnetism being lost?

 

[Drakkith]

Would it be possibly safe to use a laser without the magnetism being lost?

I don't know enough about using lasers to answer that. I would think that as long as you kept the hematite cool you would be fine.