At last years Tucson Gem Show, I think Judith Whitehead out of Tucson
had some natural diamond crystals. She is an AGTA member so it's not
her usual stock. Other than that try info(AT)supergemsgroup.com They
are the only JCK advertiser who even mentions rough diamonds and are
a diamond site holder.
Associate Editor / Art Jewelry magazine
21027 Crossroads Circle / Waukesha WI 53187-1612