About Us

Since graduating from the G.I.A. in Santa Monica, CA in 1981, David Levison has journeyed to South and Central America, Assad Kashmir in Pakistan and the diamond fields of Sierra Leone, Africa.  He has committed himself to continuing his knowledge of gemstones and jewelry.

Business Experience:

  • President and Owner Gemological Laboratory Service Corporation from 1985 to present. 
  • President and owner of Levison's Jewelry Inc. from 1998 to the present.
  • Employee and owner, president and resident gemologist of Milton Levison's Jewelry Inc. from 1980 to 2004.
  • Chief appraiser and co-owner Florida Auction Gallery of Fine Arts, Miami 1990-91.
  • Chief appraiser and co-owner International Estate Buyers Inc., Miami. 1993-95.


  • University of Florida, Gainesville, Florida
  • University of the America's, Mexico City
  • Wayne State University, Detroit
  • Gemological Institute of America
  • American Society of Appraisers
  • Accredited Gemologists Association
  • Master Gemologist Appraiser, M.G.A.
  • Accredited Gemology Laboratory, A.G.A.
  • Member International Watch and Jewelry Guild
  • National Association of Jewelry Appraisers
  • Founding member Diamond Dealers Club of Miami


  • United Nations and American Gemological Laboratory co-sponsored gemstone exploration of the ruby fields of Assad Kashmir Pakistan 1995
  • Gemstone mine exploration and buying trips to Venezuela, Peru, Monaco, Guatemala, Colombia, Guinea, Cuba, Switzerland, France and England.
  • Research and appraisal for The Queensland Star Sapphire, the largest sapphire on record at G.I.A. Laboratory, Santa Monica, California.
  • Consultant and chief gemologist in diamond mining operation in Sierra Leone, Africa.
  • Guest speaker concerning appraisal practices at The Lowe Art Museum, University of Miami.
  • Attendance at major wholesale, retail and estate jewelry and gemstone shows in New York, Tucson, Miami, Orlando and Europe.
  • Subscription to The Rapaport Diamond Report, The Specht Sheet Watch Report and auction catalogues from Christies, Sotheby's and Antiquorum.
  • Appraising for the F.B.I.,  D.E.A., local police departments, Divorce Attorneys, expert witness testimony, banks, jewelry stores, theft litigation and university and private trusts.