AIGS Laboratory New Disclosure Comments for Heat Process

New Disclosure Comments for Heat Process

AIGS Laboratory New Disclosure Comments for Heat Process
For Full report, Brief report and e-Report

1- AIGS Grading Code for Foregin Substances (Flux residues) in Fissures and / or Cavities.

Effect of Heat Process	No.Residue found	Foreign substance in Fissures			Foreign substance in Cavities
Amount of Foreign Substance	no	minor	moderate	significant	minor	moderate	significant
AIGS Foreign Substance Grading Code	HT	HT(a)	HT(b)	HT(c)	HT(1)	HT(2)	HT(3)

Example: HT (a.2) means: Minor amount of residues in fissures and Moderate amount of residues in cavities.

2- Other Codes

HT (Pb) This stone has been clarity enhanced by heat process - Lead-rich* foreign substance found in fissures and/or cavities.

HT (LE) This stone has been enhanced by heat process with light element(s) (including Be*).

HT (SD) This stone has been enhanced by heat process using surface diffusion process (Some or all of the color is artificially created and lies just at and below the surface in a thin layer - color is stable but may be removed by (re)cutting or (re)polishing).

Remark: The mention “Not LIBS tested” on a report means that the stone wasn’t tested for Light Elements treatment.

*: "Pb"is the symbol for Lead element and "Be" is the symbol for Beryllium element.

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