X

Terms and Conditions

• All Zenith Gemological Laboratory Certificates will be printed on original paper with the Zenith holograms.
• Zenith Gemological laboratory gemstones report contains the identification of gemstones by photographic images, descriptions, dimensions and weight , stating an opinion on their authenticity, treatment, country of origin, quality and rarity.
• Zenith Gemological report does not constitute a guarantee or an appraiser of the object described therein.
• The physical appearance of an object or gemstone may differ from its photographic image in the Gemstone Report. Determination of the authenticity and country of origin of a gemstone is based on the testing of chemical and physical properties and internal characteristics (e.g. inclusions and growth structures) using standard geological instruments.
• The conclusion on the country of origin, authenticity and treatment of gemstones is an opinion of the laboratory based on the direct comparison of the findings with those obtained from the analyses of reference materials, as well as those in published literature
• Zenith Gemological Laboratory shall not be made liable for any loss, damage or destruction caused to any gemstone whilst in the possession of Zenith Gemological Laboratory, arising from any reason whatsoever other than unless of proven negligence of Zenith Gemological Laboratory.
• Zenith Gemological Laboratory shall not be made liable for any loss damage or expense resulting from any defect, error, failure, elimination and lapse in any report or for its issuance or use, even if caused by proven negligence or other fault unless on grounds of proven fraud or willful misconduct of Zenith Gemological Laboratory.
• Zenith Gemological Laboratory shall not be liable for special or consequential damages arising out of any errors or omission in a report, even if advised of the possibility of such damages



---

Following

• No indication of thermal treatment: No geological constraints (for instance no altered inclusions) are present which would indicate that a heat enhancement process was applied.
• E- Clarity and/or colour are enhanced by heat. Minor residues of foreign solid materials may be present within fissures and /or cavities. The applied type of enhancement of the ruby or sapphire under consideration is, according to the opinion of Zenith Gemological Laboratory , considered a permanent enhancement. Detailed analyses of the residues present in the gemstone included the following grading (Abundance of healed fissures not graded below):
• H- Enhanced by heat (no residues present).
• E or H(a)- Enhanced by heat, residues insignificant(indication of very small residues within fissures only).
• or H(b)- Enhanced by heat, minor residues are present(within fissures only)
• H(c)- is a transitional grade between H(b) and H(d).
• H(d)- Enhanced by heat, significant residues present(within fissures and cavities).
• H(Be) -Enhanced by heat and light elements (such as Beryllium).

Close