I am just wondering if I can sell my original art as a reproduction such as a print or ornament?
You are indeed allowed to sell reproductions of your own artwork. This is the same scenario that a photographer uses, so the concept can apply to other artifacts.
One driving focus, however, is that the final product must be attractive to the consumer because of your art enhancement, not the underlying medium. The art needs to be a meaningful and valued aspect of the product being sold.