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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryIndustryJewelry & Precious Metal ManufacturingZurichBernhard Blum, Juwelier
Bernhard Blum, Juwelier Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Blum Juwelier is the manufacture and sale of individual, high-quality jewelry pieces, particularly custom-made and exclusive one-of-a-kind items, tailored to customer specifications.

AI-generated
Offering

Products & services

Industry:Jewelry & Precious Metal Manufacturing
✓ Offered4
One-off custom pieces
Individual jewellery creations according to customer wishes, made as one-off pieces in gold with gemstones; includes pendants, rings, earrings, collier necklaces, bracelets, brooches and cufflinks.
Jewellery one-off pieces
Jewellery one-off pieces made to customer request, crafted with professional skills and artistic creativity; presented as exclusive individual pieces made of gold, diamonds and other gemstones.
Jewellery creations
Individual jewellery pieces such as rings, earrings, collier necklaces, bracelets, brooches, signet rings, cufflinks and silver beakers in various gold alloys and with gemstones.
Diamond consulting and quality assessment
Advice when buying diamonds as well as quality assessments, based on gemmological training and decades of experience.
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4.1/5

Bernhard Blum, Juwelier

Trust & reputation

ranQ Trust Score of Bernhard Blum, Juwelier: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

Bernhard Blum, Juwelier scores 71.3 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.78.124%
  • 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.49.510%
  • 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.78.08%
Bernhard Blum, Juwelier scores 78.5 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%
Bernhard Blum, Juwelier 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%
Bernhard Blum, Juwelier scores 13.4 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 35.13.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Bernhard Blum, Juwelier reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 6 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 6 reviews across all connected sources

Sources
GGoogle56
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Pelikanplatz 15
8001 Zurich
Opening hours
Mon
09:00 - 18:30
Tue
09:00 - 18:30
Wed
09:00 - 18:30
Thu
09:00 - 18:30
Fri
09:00 - 18:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Sole proprietorship
UID
CHE-101.860.460
Founded
1991 · 35 years
Last commercial register change
February 14, 2024
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.
67.0
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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