Complex sentence: Although usually associated with women of reigning and noble families, tiaras have been worn by commoners as well, especially rich American socialites like Barbara Hutton, although this has been perceived as bizarre and pretentious as tiaras were normally reserved for blue-blooded ladies.
Split into simpler sentences: Although usually associated with women of reigning and noble families, tiaras have been worn by commoners as well, especially rich American socialites like Barbara Hutton. However, this has been perceived as bizarre and pretentious, as tiaras were normally reserved for blue-blooded ladies.