Will this stop the poachers?

Not if you cannot tell the difference to real rhino horns. Best way to prove its real would be the dna test.

If it has the same genetic makeup as the real one that literally means it's a Rhino Horn made without killing a Rhino, so there would be almost no difference between the two, this would cause prices to go down due to an abundance of the resource.

thats not why people buying them cause they're rare. its mystical rubbish, people want it from the real rhino silly

I don't think you understand the main point, they don't know the difference, you really are missing the point.