Glittering Stones » Gemstone Reports » Gubelin Gem Lab Report

Gubelin Gem Lab Report

Dr. Eduard J. Gubelin, one of the forefathers of modern gemology, and who were a Founding Organizing Member as well as an Honorary Member of the International Colored Gemstone Association (ICA), passed away in Lucerne, Switzerland in March at the age of 91. Dr. Gubelin was the grandfather of ICA Director Edward Boehm.Dr. Gubelin joined his father's - Eduard Gubelin Sr - gems ad jeweler business during the first quarter of the twentieth century and was soon directed toward gemology as his father established a state-of-the-art gemological laboratory in Lucerne.

Gubelin himself became well known throughout the world for his tremendous research and work in gemology. He was the author of numerous publications, spanning many decades, including the classic Internal World of Gemstones: Documents from Space & Time (1974), which showed how the direct source of gemstones might be identified by their inclusions. Today, the Gubelin Gem Lab in Lucerne continues to be one of the best-known, prestigious gemological laboratories.

The Gübelin Gem Lab additionally provides a number of specialized services which pay attention to our client’s individual needs. For more information please contact the Laboratory Special services include: Express service Appendix page Note page Special report Off-premise testing.

Gubelin Gem Lab Issues Statement on Swat Valley Emeralds:

There have been various reports in the media recently about emeralds from Pakistan. Emeralds have been mined in the region around the town of Mingora on the Swat River since the 1960s, and some of thesegems also come onto the international market.

Reportedly, in recent weeks the Islamist fundamentalist Taliban has gained control of the Swat Valley in northern Pakistan, close to the border with Afghanistan. As a result of the Taliban seizing control, these reports now assume that the proceeds from the sale of emeralds now fall into the hands of the Taliban and will therefore be used to finance its activities.

Various states and nongovernmental organizations (NGOs) have long deplored the way in which the Taliban has failed to observe basic human rights, including freedom of opinion and women’s rights. Some of these organizations demand that the trade in emeralds from the Swat valley be stopped on moral grounds. There are also calls for greater transparency regarding the provenance of traded emeralds.

Colored Stones

Authenticity and Origin Determination of Select Natural Gemstones

Identification of other Natural, Synthetic and Imitation Stones

• Minimum fee per stone CHF 165 + CHF 25 per full 5 cts.
• Where special analyses and/or special reports are required, see section D.

Diamonds

Gubelin Diamond Certificate :

Commercial Diamonds :

• Authenticity verification and quality grading of unmounted diamonds, applying the GIA system Basic fee.

Fancy Colour Diamonds

• Colour grading and identification of colour origin (not including clarity grading) Basic fee.
• Clarity grading, if requested    + CHF 100
• Low-temperature analysis, if required  + CHF 250
• Follow-up grading of repolished diamonds  50% of basic fee 

Diamond Type Note

• Diamond Type Notes (excl. Report) are also available for diamonds up to 5 ct according
  to the following table:
• For diamonds over 5 ct please contact us.

Pearls

Identification by optical analysis and                            
X-radiography

• Single pearl (loose)
• Single strand / one-row necklace
• Each additional row

Average Pearl Measurement:

Miscellaneous

If required, the services listed below may be carried out by Gubelin Ateliers AG specialists or independent specialized companies, however, only upon the customer's written request and at his/her expense and risk. Please enquire with the Gubelin Gem Lab for details.

• Unmounting of gemstones and pearls
• Re-/mounting of gemstones and pearls
• Restringing of pearls
• Repolishing of diamonds, colored stones, etc.

No appraisals are issued by Gubelin Gem Lab Ltd.