Invisible setting has posed many problems as it was readily embraced
by manufacturers that really had no clue. Some pieces that I have
seen are accidents waiting to happen. This as particularly true of
the no-wall pieces that have come onto the market. Most manufacturers
ask that you send any work, including sizing back to them. Many state
that they will not work on any piece that has been worked on
previously by someone else. That said, I recently came across an
advertiser in Modern Jeweler magazine (March 2004) that bills itself
in bold headline “INVISIBLE EXPERTS”. “Specializing in invisible set
diamond jewelry” I have not used this service and cannot recommend
them, but I thought that I would pass this along. The
name of the company is Signature Jewelry. 877-8-EXPERT.,
213-624-6026. They are at 617 South Olive St. Suite 302,
Los Angeles, CA 90014.