I have this set of detail turning tools:

http://fisch-woodworking.com/detailturningtools.shtml

Why do I have two types of parting tools? Is there a different use for a diamond parting tool vs. a standard parting tool? Also, could I use the standard parting tool in a similar fashion as a skew (since I don't have one of those) or would this be a "no-no?"

Thanks!