Call us: (617) 529-GEMS | (781) 334-2211

New England’s Most Advanced Gemological Laboratory

John A. Caruso, GG, ASG, AiSV recognized a need for a qualified service that will offer fast and efficient scientific laboratory testing available to the industries and the public in need of competent gemological services.

These services are done to provide you with the needed reports capable of reinforcing the stated value of a given piece of jewelry or any precious object.  Having precious objects tested by a professional, who knows how to properly care for & handle these objects, is very important. The trust you will acquire in knowing that a knowledgeable expert in the field of gemology is ready to serve you is a concern that offers you complete confidence in our lab.

We would like the opportunity to meet with you and discuss how we may be of service . References and testimonials are available upon request.

Do not let the Insurance Companies get the best of YOU!!!



  • Graduate Gemologist – Gemological Institute of America (GIA)
  • Accredited Senior Gemologist – Accredited Gemologist Association
  • Advanced Diamond Grading (GIA)
  • Pearls (GIA)
  • Identifying Synthetics & Treatments
  • Advanced Gemology (GIA)
  • National Association  of Jewelry Appraisers (Senior Member)
  • AISociety – Appraisers International Society (AiSV)
  • Lecturer (Gemology ) – Northeastern University (Retired)
  • Mentor – Gemological Institute of America


  • GIA Alumni Association
  • National Association of Jewelry Appraisers
  • Accredited Gemologists Association
  • AISociety – Appraisers International Society
  • New York Diamond Dealers Club
  • New England Jewelers Association
  • Appraisal Information Network
  • Northeastern University Faculty
  • Boston Jewelers Club
  • International Ivory Society

3 Bradford Road Danvers Ma 01923 Phone(617) 529 Gems (781) 334-2211