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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesMarket Research InstitutesBaselSchweizerische Stiftung für Edelsteinforschung
Schweizerische Stiftung für Edelsteinforschung Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Schweizerische Stiftung für Edelsteinforschung operates a gemmological laboratory that carries out analyses and identification tests on coloured gemstones, diamonds and pearls and issues laboratory reports. It also provides specialised analyses (e.g. age dating, DNA fingerprinting, GemTrack™), conducts scientific research and offers gemmological education courses.

AI-generated
Offering

Products & services

Industry:Market Research Institutes
✓ Offered8
Gemmological analysis and certification
Gemstone, diamond and pearl testing with identification reports, origin determination, treatment detection and report verification for loose stones, mounted stones, jewellery and lots.
Gemmological continuing education
Gemmological courses for entry-level, advanced and scientific participants, including in-person courses, free online courses, tailored courses and Gem-A lab classes and exams.
Research and development in gemmology
Scientific research on diamonds, gemstone origin, pearls and analytical methods, including new instruments, treatment detection, origin determination and collaboration with universities and industry partners.
DiamondTrack™
Tracking service for diamonds from rough state through cut and polished gemstone, offered with diamond grading report options and related testing.
GemTrack™
Tracking and characterisation service for gemstones, including testing rough stones with a polished window, cut gemstones and later updates after setting in jewellery.
DNA-Fingerprinting
DNA species identification for coral, ivory and pearls as an additional testing service, billed per sample and combined with report pricing.
Age Dating
Radiocarbon age dating for pearls, offered as an additional analytical service and also referenced among report options.
On-site testing
On-site testing service for gemstones and related items, referenced among quick links for testing inquiries and submissions.
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4.4/5

Schweizerische Stiftung für Edelsteinforschung

Trust & reputation

ranQ Trust Score of Schweizerische Stiftung für Edelsteinforschung: 4.4 out of 5.0

Trust Score4.4/ 5.0

Very high

x

Data basis 96% · As of October 2026

Schweizerische Stiftung für Edelsteinforschung scores 72.8 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
x
CriterionValueWeight
  • Review quality: The average rating across all connected sources, smoothed against the industry mean. So 5.0 stars from three reviews do not outrank 4.7 from three hundred.76.724%
  • Review volume: The number of reviews across all sources. The scale is logarithmic: the first reviews count the most, and the maximum is reached at 50 reviews.45.610%
  • Review recency: The age of the most recent review. Two-year-old reviews deliberately sit in the middle, because that is normal for Swiss SMEs. Only after three years without a new voice does the value drop markedly.95.08%
Schweizerische Stiftung für Edelsteinforschung scores 88.6 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.70.07%
Schweizerische Stiftung für Edelsteinforschung scores 85.0 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).85.022%
Schweizerische Stiftung für Edelsteinforschung scores 100.0 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 35.100.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Schweizerische Stiftung für Edelsteinforschung reaches a ranQ Trust Score of 4.4 out of 5.0 — rated «Very high». The rating draws, among other things, on 5.0 out of 5 stars from 5 customer reviews. The data basis is 96%, 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.

Reviews

Aggregated rating

Aggregated rating
5
of 5

Aggregated from 5 reviews across all connected sources

Sources
GGoogle55
★TrustpilotSoon
PProvenExpertSoon

Further sources are added continuously and factored into the ranQ Rating.

Knowledge

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Location

Aeschengraben 26
4051 Basel
Opening hours
Mon
09:00 - 12:00, 13:00 - 17:00
Tue
09:00 - 12:00, 13:00 - 17:00
Wed
09:00 - 12:00, 13:00 - 17:00
Thu
09:00 - 12:00, 13:00 - 17:00
Fri
09:00 - 12:00, 13:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Foundation
UID
CHE-106.026.211
Founded
1973 · 53 years
Last commercial register change
November 21, 2023
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.97.06%
  • 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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