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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,701 companies indexed · Last updated: today
DirectoryIndustryJewelry & Precious Metal ManufacturingLa Chaux-De-FondsPetra Gem Sàrl
Petra Gem Sàrl Logo
Verified· 2 sourcesTrust Score
Summary

About the company

Petra Gem Sàrl is a company that processes gemstones and mother-of-pearl for jewellery and watch components. Services include cutting and pre-cutting of gemstones and nacre, CNC machining, polishing, quality control and assembly; the company supplies semi-finished or finished dials and can produce pre-cuts or finished shapes for the jewellery sector.

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Products & services

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Petra Gem Sàrl

✓ Offered4
Cutting and processing of gemstones and mother-of-pearl
Cutting, pre-cutting, polishing and finishing of gemstones and mother-of-pearl, with work on materials such as malachite, lapis lazuli and tiger’s eye.
Manufacture of watch dials
Manufacture of mother-of-pearl dials, with semi-finished or finished parts, complying with Swiss Made standards and with finishing in Switzerland with Swiss partners.
Subcontracting for jewellery and watchmaking
Subcontracting services with cutting, finished shapes, mounting/assembly, polishing, quality control and progressive integration of components with local partners.
Pre-cutting and finished shapes for jewellery
Pre-cut pieces and finished shapes for the jewellery sector, with alternatives for development projects and adaptation to customer needs.
Trust & reputation

ranQ Trust Score of Petra Gem Sàrl

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

Petra Gem Sàrl 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%
Petra Gem Sàrl scores 65.0 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.58.012%
  • 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%
Petra Gem Sàrl scores 83.3 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).83.322%
Petra Gem Sàrl scores 0.0 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 35.0.04%
  • 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

Rue Jacod-Brandt 61
2300 La Chaux-De-Fonds

At a glance

Legal form
Limited Liability Company
UID
CHE-485.960.844
Founded
2022 · 4 years
Last commercial register change
July 7, 2026
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.
88.0
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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