GIA Certificate

Our review on GIA diamond certification

GIA's mission is to raise the customers' trust in diamonds utilizing the best expectations of professionalism, science, and integrity. They want to accomplish this by providing  training, doing research, and developing sophisticated lab equipment that may be used to check diamonds. A gia diamond certificate is well respected in the industry.

As of January 2020 GIA has suspended its diamond sealing services.  https://www.gia.edu/gia-news-press/diamond-sealing-services-suspended

As of January 2023 all GIA certificates become fully digital , more information can be found on the gia website. 

At least four  graders that were trained examine the diamonds that are graded. At each step of the stone's examination, a more experienced employee individually examines the stone. To ensure impartial assessments, the submission of stones to graders is a completely arbitrary procedure.

• Carat
  After a stone's carat weight is inspected, its measurements, depth, table, angles, culet, and girdle thickness are noted.
• Color
  A  stone's color is rated on a scale ranging from D (colorless) to Z (light yellow) by comparing it to diamonds of predetermined color.
• Clarity
  Clarity is evaluated on range from FL (flawless) to I3 (included) based on an examination of the stone under a binocular microscope of 10x magnification. The stone's features are plotted on a diamond diagram.
• Cut Grade
  Cut rating is established for brilliant round-cut stones based on the examination of the craftsmanship used when creating the stone and the interaction of the stone with light. The degree of a stone's craftsmanship is determined by considering its polish, symmetry, and proportions. The stone's light interaction is based on its brightness, scintillation, and fire. GIA determines the quality of a cut on a grading scale ranging from Excellent to Poor.
• Polish & Symmetry
  A diamond is evaluated for polish and symmetry on a grading scale ranging from Excellent to Poor. The grade is based on an inspection of the diamond's craftsmanship.
• Fluorescence
  A stone's fluorescence is decided as None, Faint, Medium, or Strong based on its reaction to uv light.
• Laser Inscription
  For extra security and identification, a diamond's girdle can be laser inscribed with its  report number. GIA offers laser inscription services for all of the loose stone's they rate.