OK, spending some time searching again online, it seems that the CBP recommends entering the list of personal effects on a regular Customs form CBP6059B.

However, would I be correct in ascertaining that in the first part of the form (Box 15) where one should list value of items acquired overseas, that part should NOT be filled out (with the value of the jewelry). However, on the second page "Description of articles", the jewelry should be listed, but perhaps with an addendum -- personal effects, acquired in US 2007 or whatever, along with approximate value??

tb