Business Experience:

• President Joseph W. Tenhagen Appraisals, Inc., 36 N.E. 1st Street, Miami, Florida 33132
• Sales and Appraisal of Gemstone and Jewelry, 1973 to 2000.
• Independent Appraiser 2000 to Present.
• Appraisal experience: Joseph W. Tenhagen Gemstones Inc., Jewelers, Individual, Estates, Banks, Attorneys, Federal Bureau of Investigation, Department of Treasury, Securities and Exchange Commission, Internal Revenue Service, FDIC, Assists various law enforcement agencies on Gem & Jewelry theft, litigation, and appraisals, Experienced expert witness in numerous court cases, Federal, State, County & local courts 1975- Present.

Education:

• University of Miami at Coral Gables, Florida
• Geology Major, Chemistry Minor
• Gemological Institute of America
• Graduate Gemologist, G.G. Diploma, 1969
• Gemmological Association of Great Britain
• Fellowship F.G.A. Diploma, 1969
• National Association of Jewelry Appraisers
• American Society of Appraisers
• A.S.A. Senior Member, 1983-1995
• Recertified July 1991
• Master Gemologist Appraiser, M.G.A.1983-1995

Publications:

• Publisher of the “Diamond Value Index”, 1995 -1998
• Precioustones Newsletter, Past Member Editorial Advisory Board
• Articles published in: Gems & Gemology, Lapidary Journal, The Jewelry Appraiser, Jewelry Lapidary Business and PresiouStones Newsletter
• Listed in the first edition of Who’s Who in the Jewelry Industry, 1979.

Professional Societies and Activities:

• Panelist and speaker at Gemological Institute of America’s Gemological Symposiums:
• “Appraisal War Room,” 1999
• “Evaluation, Appraisals, Ethical and Legal Questions,” 1991
• Charter Member, Past President, Past Secretary Diamond Dealers Club of Florida, resigned 2005
• Associate Director, National Association of Jewelry Appraisers
• Senior Member, American Society of Appraisers 1983-1995
• Co-Chairman of the International Board of Examiners, Gems & Jewelry Specialty ’86-‘94
• Chairman of the Gems & Jewelry Specialty 1981-1991
• Co Course designer and instructor, Master Gemologist Appraiser Course ’83-’84,’87-‘94
• President of the Accredited Gemologist Association 1981-1984
• Vice President of the Accredited Gemologist Association 1980

Gemological and Appraisal Teaching Experience:

• Adjunct Professor at Palm Beach Community College
• National Association of Jewelry Appraisers
• Miami Shores Community Center
• American Society of Appraisers
• Miami Jewelry Institute
• Broward Community College
• Academy of Fine Jewelry
• Museum of Science and Planetarium
• Member of Dade County Fair, Co Superintendent of Mineral, Gems & Jewelry Dept. 1979-Present
• Assists various law enforcement agencies on Gem & Jewelry theft, litigation, and appraisals, experienced expert witness in numerous court cases, Federal, State, County & City courts.