Very small, simple, very nice. Exactly what I was looking for.  I've worn this item for 2 week with no sign of tarnish.
<a data-hook="product-link-linked" class="a-link-normal" href="/Sterling-Silver-Star-of-David-Pendant-18/dp/B000FLYMF8/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Sterling Silver Star of David Pendant, 18"</a>

Updated 1 Jan, 2013 : No tarnish after worn more than one year.