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Gubelin

The gemological research center Gübelin Gem Lab dates back to 1923, when Eduard Josef Gübelin’s father, Eduard Josef Gübelin, Eduard Moritz Gübelin, the owner of the Gübelin trading house, decided to expand the business by opening jewelry by opening jeweler’s opening jewelry by opening jeweler’s by opening jewelry jeweler, by opening jewelry . In the same year, a gemmological laboratory was established at the trading house for the needs of the jewelry studio and boutique. However, the laboratory “Gübelin Gem Lab”, headed by Edward Joseph Gübelin, became widely known as a research center in the 1960s, when leading European jewelry companies began to show interest in the scientific gemological accompaniment of premium class stones.

Since the early 1930s, Edward Joseph Gyubelin (Eduard Josef Gübelin, 1913-2005) began to study the mineralogy of the Higher Technical School in Zurich (Eidgenössische Technische Hochschule Zürich), and in the years 1936/37 - gemology at the Gemological Institute (Institut für Edelsteine) in Vienna (Wien), Austria. In 1939, he went to the USA, where he successfully studied at the Gemological Institute of America (GIA) and passed the exam for the degree of a certified gemologist (CG). Upon his return, Gübelin took up the activities of the gemological laboratory.

In the 1940s and 50s, Gübelin studied in depth the intrinsic features of jewelry stones and at the same time was engaged in the development of new gemological equipment, expanding the range of properties studied. Such devices include: a fluoroscope, a magnetoscope, a polariscope, a resistivity meter, and other auxiliary equipment. Gübelin’s conclusions were always based on a comparative analysis, the basis for which was the collected and constantly replenished working collection of jewelry stones.

Edward Gübelin resigned from the post of head of the gemological laboratory in 1976, but he continued to conduct research and study of jewelry stones in his home laboratory all his life.

He was replaced by his brother, Walter Gübelin, and since 1988, his son, Thomas Gübelin. From 2011 to the present, the company is headed by Tomha’s son, Raphael Gübelin, with his wife Wilvy Sy Gübelin.

Currently, the Gübelin Gem Lab is one of the largest think tanks. It is located in Lucerne (Switzerland), and also has branches in Hong Kong (China) and New York (USA). Laboratory activities are closely related to the educational cluster of the Academy of Gübelin, founded in 2013 and conducting course and thematic classes, including field seminars.

Gübelin Gemological Records

Gemological reports issued by the certification laboratories "Gübelin Gem Lab" are traditionally the most prestigious accompanying documents for commercial transactions with jewelry of the highest category, especially for colored stones.

The external design of gemological reports, “Gübelin Gem Lab” is unified for each type of jewelry stones.

All gemological reports have the following information blocks:

  • Company `s logo.
  • Full-color image of the subject of expertise.
  • A unique number that consists of 6,7 or 8 numeric characters, including the date in the format year-month.
  • Method of location of the branch of the laboratory and date. The location is indicated if the conclusion is issued by the branch of the laboratory and is determined by the name of the city (New York, Hong Kong). Date, in the format - number (numeric characters), month (alphabetic characters), year (numeric characters).
  • A brief description indicating the type of object of study.
  • The weight of a stone, stones separately or the total weight of stones.
  • The shape of the cut is determined by the girdle contour.
  • Type of cut.
  • The size of the stone (in millimeters).
  • Transparency.
  • Color (in the description of the spectral tint).
  • Trade color terminology (for top quality colors).
  • Determination of the mineral species, its origin (synthetic, natural), as well as in the presence of refining - the fact of refining.
  • Determination of the mineral species.
  • For a number of jewelry stones, expert opinion on the geographic region of stone mining is indicated.
  • Notes. The fact of absence or presence of refinement is indicated, as well as the type of refinement and its degree.
  • Comments. The comments reflect additional information on the properties of the stone not included in the gemmological report.
  • The report is certified by the signature of the expert and the director of the laboratory.
  • Link to the lab email address.

In addition, “Gübelin Gem Lab” in the “LUX” class produces detailed reports of the “GEMMOLOGICAL PROFILE” format in the form of a brochure with detailed information on the history of geology, mining, and refining. For exclusive stones, reports are made in the GEMMOLOGICAL PORTRAIT format, which is a separate publication on a comprehensive gemological study of the stone submitted for examination.

Examples of registration reports gemological center "Gübelin Gem Lab":

«Gemmologicale Report» for natural emerald

«Anatomy» of a gemological report «Gemmologicale Report» for natural emerald:

  1. Company`s logo
  2. Full-color image of the object of examination
  3. Unique report number
  4. Date
  5. Description of the object of examination
  6. Carat weight
  7. Cut Shape
  8. Cut type
  9. Linear dimensions in millimeters
  10. Degree of transparency
  11. Color (main spectral tint)
  12. Mineral view
  13. Mineral variety
  14. Notes
  15. Link to terms and conditions
  16. Signatures of the expert and the director of the laboratory
  17. Link to electronic resource
«Gemmologicale Report» for natural ruby

«Anatomy» of a gemological report «Gemmologicale Report» for natural ruby:

  1. Company`s logo
  2. Full-color image of the object of examination
  3. Unique report number
  4. Date
  5. Description of the object of examination
  6. Carat weight
  7. Cut Shape
  8. Type of cut (crown / pavilion)
  9. Linear dimensions in millimeters
  10. Degree of transparency
  11. Color (main spectral tint)
  12. Trade color terminology (for top quality colors)
  13. Mineral view
  14. Mineral variety
  15. Expert opinion on the geographic region of stone mining
  16. Notes (about the absence of refining signs)
  17. Comments
  18. Link to terms and conditions
  19. Signatures of the expert and the director of the laboratory
  20. Link to electronic resource
«Gemmologicale Report» for natural sapphire

«Anatomy» of a gemological report «Gemmologicale Report» for natural sapphire:

  1. Company`s logo
  2. Full-color image of the object of examination
  3. Unique report number
  4. Date
  5. Description of the object of examination
  6. Carat weight
  7. Cut Shape
  8. Type of cut (crown / pavilion)
  9. Linear dimensions in millimeters
  10. Degree of transparency
  11. Color (main spectral tint)
  12. Mineral view
  13. Mineral variety
  14. Expert opinion on the geographic region of stone mining
  15. Notes (about the absence of refining signs)
  16. Comments
  17. Link to terms and conditions
  18. Signatures of the expert and the director of the laboratory
  19. Link to electronic resource
«Gemmologicale Report» for jewelry with colored stones

«Anatomy» of a gemological report «Gemmologicale Report» for jewelry with colored stones:

  1. Company`s logo
  2. Full-color image of the object of examination
  3. Unique report number
  4. Date
  5. Description of the object of examination
  6. The weight of the object of examination in grams
  7. Cut shape (each type of inserts)
  8. Type of cut (crown / pavilion)
  9. Linear dimensions in millimeters (for each type of insert)
  10. Degree of transparency
  11. Insert colors (basic spectral tint)
  12. Mineral view
  13. Mineral variety
  14. Expert opinion on the geographic region of stone extraction (for each type of insert)
  15. Notes (on the presence of signs of refining and the degree of refining)
  16. Link to terms and conditions
  17. Signatures of the expert and the director of the laboratory
  18. Link to electronic resource