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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,837 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTesting & Inspection CentersTramelanSWISS SINO GEMOLOGICAL LABORATORY GMBH
SWISS SINO GEMOLOGICAL LABORATORY GMBH Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of Swiss Sino Gemological Laboratory (SSGL) is the performance of gemological tests and analyses, particularly the identification and evaluation of precious stones such as rubies, sapphires and emeralds. This includes the verification of treatments and the determination of the origin of these precious stones. The company also offers a scientific method for quality assessment of precious stones.

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SWISS SINO GEMOLOGICAL LABORATORY GMBH

✓ Offered
4
Gemstone testing and analyses
Gemstone tests without diamonds, treatment identification and origin determination for rubies, sapphires and emeralds; non-destructive testing with microscopy and inclusion analysis.
Gem certificates and reports
Standard Report, Grading Report and Grading Report for mounted stones; online report verification with details on treatment, identification and quality level.
Quality grading of gemstones
Objective quality assessment of coloured stones based on colour, cut and clarity; optional inclusion of weight and rarity.
Gemmological training
Seven-module course with certification as Certified Gemologist; classes in Bangkok for enthusiasts, dealers and jewellers.
Trust & reputation

ranQ Trust Score of SWISS SINO GEMOLOGICAL LABORATORY GMBH

Trust Score

No score yet

x

A published score requires a data basis of at least 50% and data from at least two criteria groups other than identity. Missing evidence: Review quality, Review volume, Review recency, Media authority

Data basis 54% · As of October 2026

SWISS SINO GEMOLOGICAL LABORATORY GMBH 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%
SWISS SINO GEMOLOGICAL LABORATORY GMBH scores 75.7 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.83.012%
  • 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%
SWISS SINO GEMOLOGICAL LABORATORY GMBH 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%
SWISS SINO GEMOLOGICAL LABORATORY GMBH scores 0.0 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
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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 35.0.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%

The data basis is 54%, below the threshold at which ranQ publishes a score. Evidence is missing for: Review quality, Review volume, Review recency, Media authority. As of October 2026.

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

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Location

Grand-Rue 169
2720 Tramelan

At a glance

Legal form
Limited Liability Company
UID
CHE-153.569.078
Founded
2017 · 9 years
Last commercial register change
January 13, 2022
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.88.06%
  • 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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