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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTesting & Inspection CentersLucerneGübelin Gem Lab Ltd.
Gübelin Gem Lab Ltd. Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The Gübelin company is primarily active in the analysis and certification of precious stones. It offers services such as colour grading, Provenance Proof, report verification and scholarships to dealers and collectors. Additionally, it provides online lectures and training in the field of gemmology.

AI-generated
Offering

Products & services

Industry:Testing & Inspection Centers
✓ Offered11
Gemmological Report
Gemmological appraisals for gemstones and jewellery, determining identity, authenticity and origin, with details of treatments and scientific analysis data.
Gemstone Rating
Assessment of coloured gemstones by quality, rarity and distinctiveness; issued as Gübelin Points, and if needed as a separate rating document or together with a report.
Gem Passport
Document for small rubies, blue sapphires and emeralds with automated analysis data evaluation, providing simplified details on identity, origin and treatment status.
Jewellery Passport
Reduced test document for jewellery with multiple gemstones; includes simplified information on identity, authenticity, origin, treatments and selected test characteristics.
Gemmological Profile
Supplementary, more detailed document to the Gemmological Report, including background on the stone type, history, origin, inclusions as well as analytical, microscopic and chemical data.
Gemmological Portrait
Special book documentation for outstanding gemstones, with additional information on rarity and quality, extensive imagery and available only for selected stones.
Mobile Laboratory (OPT)
Mobile laboratory for off-premises testing at locations worldwide, especially for coloured gemstones; enables on-site testing with comparable scientific standards.
Express Service
Expedited testing with a turnaround time of two to three working days for an additional fee; for urgent cases after prior clarification with the laboratory.
Shuttle Services
Global pick-up and drop-off network for safe, convenient and cost-effective shipping of items to the laboratory for testing.
Provenance Proof
Traceability solution with physical and digital trackers, as well as blockchain for transparency along the gemstone supply chain, including the Emerald Paternity Test.
Age Determination
Determination of the geological age of gemstones using isotopic analysis, radiometric dating and mineralogical expertise to classify the formation of crystals.
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4.1/5

Gübelin Gem Lab Ltd.

Trust & reputation

ranQ Trust Score of Gübelin Gem Lab Ltd.: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 58% · As of October 2026

Without public customer reviews the score stays capped.

Gübelin Gem Lab Ltd. has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
x
CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
Gübelin Gem Lab Ltd. scores 89.3 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
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CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.100.012%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.70.07%
Gübelin Gem Lab Ltd. scores 85.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
x
CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).85.022%
Gübelin Gem Lab Ltd. scores 56.7 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.100.04%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.13.34%
Qualifications+0.00

Gübelin Gem Lab Ltd. reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». No public customer reviews are available for this provider; the rating is based on the remaining criteria. The data basis is 58%, so the score is backed by part of the criteria. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Press

Media

October 3, 2021Media
Gübelin introduces coloured gem grading system
swissinfo.ch

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Secure profile

Location

Maihofstrasse 102
6006 Lucerne

At a glance

Legal form
Corporation
UID
CHE-106.514.479
Founded
1998 · 28 years
Last commercial register change
April 8, 2024
Employees
11 to 20
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.
100.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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