GAAJ-ZENHOKYO Laboratory supports a reliable gem report with the most highly sophisticated techniques and abundant experience. Determination of natural and synthetic gem coloured stones authenticity, heat treatment and fissure filling disclosure. Specializes in analysis service for "Geographic Origin" determination of Corundum and Emerald. Reports are written in English based on LMHC standard wording and are issued within 5 working days.
For Ruby & Sapphire Authenticity
& Heat treatment disclosure
& Fissure filling disclosure
& Geographic Origin determination
& Padparadscha colour selecting
For Emerald Authenticity
& Filling treatment disclosure
& Geographic Origin determination
For blue-green colour Cu-bearing Elbaite Tourmaline (Paraíba Tourmaline) and other
varieties
For all coloured gemstones Authenticity
& Treatment disclosure
Determination of Authenticity for all types of Diamonds. Identification of colour origin and detection of HPHT process, irradiation and coating treatment.
Report requires 3 working days for issuing.
&Identification of colour origin for Fancy Colour Diamonds and Treatment disclosure
(HPHT process, irradiation, coating)
(Not including Diamond grading)
& Identification of Authenticity verification of mounted diamond
Identification of all types of Pearls (natural pearls, cultured pearls and imitation pearl), and treatment on pearls.
Report requires 3 working days for issuing.
Report is including saltwater / freshwater determination and colour treatment disclosure.
&For identification of natural pearl and cultured pearl, beaded and non-beaded cultured pearls,
X-ray radiography analysis is required.
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