This is the solution noted in the Comprehensive LaTeX Symbol List (p. 104 in the A4-format PDF):
Sometimes an ordinary tabular environment can be co-opted into
juxtaposing existing symbols into a new symbol. Consider the following
definition of \asterism ... from a June 2007 post to comp.text.tex by
Peter Flynn:
\newcommand{\asterism}{\smash{%
\raisebox{-.5ex}{%
\setlength{\tabcolsep}{-.5pt}%
\begin{tabular}{@{}cc@{}}%
\multicolumn2c*\\[-2ex]*&*%
\end{tabular}}}}
Note how the space between columns (\tabcolsep) and rows (\[. . . ])
is made negative to squeeze the asterisks closer together.
This code provides a command \asterism which produces the following symbol with the default LaTeX fonts (at the greatest magnification my viewer will allow):

What I used when I needed this (and had never even heard of an asterism) was to use a solution similar to Gonzalo Medina's but without the need for pgfornaments (which I'd also never heard of and which might not have been written):
\documentclass{article}
\usepackage{pifont,kantlipsum}
\newcommand*{\altasterism}{\vspace*{1em plus .5em minus .5em}\noindent\hspace*{\fill}\ding{104}\hspace*{\fill}}
\begin{document}
\kant[1]
\altasterism
\kant[2]
\end{document}
This produces the following:

What I liked about this symbol was that it was relatively unobtrusive and did not distract from the text. It did just enough to delineate the end of the description of one thing and the beginning of the next, without detracting from the focus on those descriptions.
Obviously you could substitute a different character or a symbol from an entirely different font, thus providing a great many variations to produce more-or-less decorative effects and more-or-less stringent breaks.
I would say this: it would be very easy to go over the top with this kind of thing. I really think 'less is more' in this kind of case. The typography should draw attention to the text and not away from it. (Ideally, the reader should not really notice the typography at all.)