Patina offers these important links for information that
may be of interest to you.

FYI:

Illeagal Diamond Trade
http://www.stopblooddiamonds.org/US-Policy-Laws.asp

Gold Market Tracking
www.kitco.com

Professional art consulting services in Los Angeles California. Specialist in high end art for your collection
http://www.perkeyfineart.com/resources.html