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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryRetail & CommerceWholesale - Watches & JewelryNeuchâtelGLS gemmologie laboratoire service S.A.
GLS gemmologie laboratoire service S.A. Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of GLS SA (Gemmologie Laboratoire Service SA) is the expertise of jewelry, precious stones and watches.

AI-generated
Offering

Products & services

Industry:Wholesale - Watches & Jewelry
✓ Offered6
Expertise in jewellery
Expertises de bijoux, pierres précieuses et montres pour assurance, succession et partage; documents avec photos, indication de la valeur, déplacement possible avec matériel de laboratoire.
Grading for watchmaking
Grading for watchmaking and quality reports on lots of diamonds (mixed).
Continuing education
Tailor-made courses in sales, knowledge of coloured stones and diamonds; teaching in French, German and English, at the place and on the date you want.
Sales course for watchmaking-jewellery
Two-day training in sales, advice, the quality of watch or jewellery components, closing the sale and after-sales service.
Diamond knowledge course
Training on the characteristics of the diamond, quality criteria, the assessment of a set diamond and communicating quality to customers.
Course on precious stones
Training on the classification of precious stones, their origins, cuts, physical characteristics, colour, quality, synthetic stones and imitations.
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4.1/5

GLS gemmologie laboratoire service S.A.

Trust & reputation

ranQ Trust Score of GLS gemmologie laboratoire service S.A.: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

GLS gemmologie laboratoire service S.A. 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.
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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%
GLS gemmologie laboratoire service S.A. scores 85.5 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
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.55.07%
GLS gemmologie laboratoire service S.A. scores 83.3 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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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).83.322%
GLS gemmologie laboratoire service S.A. scores 3.1 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 35.3.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

GLS gemmologie laboratoire service S.A. 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 54%, 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.

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Location

Rue du Musée 2
2000 Neuchâtel

At a glance

Legal form
Corporation
UID
CHE-108.073.405
Founded
2007 · 19 years
Last commercial register change
May 20, 2009
Employees
1 to 10
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.100.06%
  • 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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