Treatments Disclosure

Many diamonds on the market have undergone treatments to enhance their color or clarity. The US Federal Trade Commission’s (FTC) Code of Federal Regulations, Section 23.22, states: “It is unfair or deceptive to fail to disclose the treatment of a gemstone if:

A)     The treatment is not permanent
B)     The treatment creates special care requirements for the gemstone
C)     The treatment has a significant effect on the stone’s value. “

In compliance with the FTC Code, and with the intent to ensure customer confidence in diamonds submitted for certification, EGL Laboratories implement the following measures:

  • Disclosure of all diamonds that have undergone clarity treatment processes such as laser intervention and fracture filling.
  • Disclosure of all diamonds that have undergone color enhancements includingHPHT (high pressure/high temperature), irradiation or coating.

EGL gemologists can detect clarity enhancements unaided or with a microscope, and use state-of-the-art equipment to spot gemstones that have undergone color enhancements, as follows:

  • FTIR (Fourier Transform Infra-Red Spectroscopy) –Used to classify the diamond crystal type. Generally diamonds identified as Type llA are submitted for further testing to detect HPHT treatment.
  • Raman Spectroscope – Identifies HPHT-treated diamonds.
  • UV-Vis – Indicates whether a fancy colored diamond has its natural color or underwent treatment.
  • Diamond View – Detects if the diamond is natural or synthetic (lab-grown).

All treated diamonds submitted for certification at EGL Laboratories are classified as clarity or color enhanced, HPHT-treated or lab-grown on the respective EGL Diamond Report.