Disclosure in Gem Enhancement - Emerald Enhancment

"The United States Federal Trade Commission (FTC) states that it is unfair or deceptive to fail to disclose that a gemstone has been treated if: (a) the treatment is not permanent. The seller should disclose that the gemstone has been treated and that the treatment is or may not be permanent; (b) the treatment creates special care requirements for the gemstone. The seller should disclose that the gemstone has been treated and has special care requirements to the purchaser; (c) the treatment has a significant effect on the stone's value. The seller should disclose that the gemstone has been treated."   (section ruling 23.22, United States Federal Trade Commission)

Emerald Enhancement TreatmentA gem-quality emerald with no enhancement is among the rarest of gems. For this reason, virtually all emeralds in the world today have undergone clarity enhancement before they are put in the market place. All major colored stone trade organizations and gemological laboratories recommend disclosure of this known fact in a professional manner.

Emerald comparision: traditional enhancement vs. ExCel process over time

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Picture A) Illustrates the ultimate fate of traditional enhancements which results in the drying out and breakdown of the enhancement substance.
Picture B) Illustrates the same stone enhanced with the ExCel Process.


The inherent "market value" of a stone does not change by its enhancement substance.

Cedarwood enhancement vs. Excel Process

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Illustrated here is the same stone, one enhanced with cedarwood oil (left) and one with the ExCel Process (right), showing that the only difference between the two stones is the "quality" and the "stability" of the enhancement substance.

Clarity Enhancement Substances

"A good filling substance should have certain properties: It should hide fissures, it should flow into the fractures (i.e., be liquid, at least initially), it should hold up over time or else be easy to restore, and it should be removable or not have any physical properties that might later harm the stone (e.g., during jewelry repair or re-polishing). It should also have an R.I. similar to that if the stone being treated."   (Emerald Filling Substances, Gems & Gemology, Summer 1999)

Clarity Enhancement in Emeralds

"Emeralds from all sources generally contain fissures, and emerald processing (e.g., mining, fashioning, and jewelry manufacturing) can add fractures as well. The filling of such surface-reaching features (hereafter called fissures) to make them less visible has been practiced for centuries." (Emerald Filling Substances, Gems & Gemology, Summer 1999)

Important Questions Today

What is the effect of the degree of enhancement on an emerald's appearance? How does the enhancement change with time, normal wear, and other typical events in the life of a piece of fine jewelry? (Emerald Filling Substances, Gems & Gemology, Summer 1999)

"The ExCel Process eliminates the traditional re-oiling of emeralds, and with its lifetime guarantee, disclosing the ExCel Process should be the beginning of restoring the confidence that has been lost in the gem industry."

Clarity Enhancement Laboratory offers trade-expert cutters to re-polish or re-cut their emeralds.

Same emerald before and after ExCel Process - Emerald Enhancement Treatment

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In addition to being enhanced, this stone was also repolished