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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,904 companies indexed · Last updated: today
DirectoryRetail & CommerceJewellerZurichA. Ruppenthal AG
A. Ruppenthal AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The company Ernst Stein (A. Ruppenthal KG) is a wholesaler and online retailer of precious stones, pearls, diamonds and jewelry accessories. The core activity of the company is the procurement, sale and distribution of precious stones, pearls and jewelry accessories to business customers, in particular jewelers and jewelry manufacturers. The company offers a wide range of products and is present at major trade fairs.

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Service area

Offering

Products & services

Industry:Jeweller
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4.3/5

A. Ruppenthal AG

✓ Offered7
Gemstones
Single stones, pairs and strands; cut gemstones in various cuts and stone types, carvings, as well as white and coloured diamonds.
Pearls
Loose cultured pearls, single, as pairs or strands in all common cultured pearl types; part of the continuously available range.
Jewellery
Series jewellery such as memory rings, as well as interesting individual pieces; complemented by gemstone jewellery in the B2B assortment.
Clasps and accessories
Clasps in various designs, e.g. interchangeable and magnetic clasps, in gold, silver and steel, plus matching accessories.
Cutting, engraving and jeweller's work
Grinding, re-grinding and engraving to order; restringing necklaces and bracelets, and making, restoring, repairing and setting jewellery.
Trade fair and branch service
Presence at the most important trade fairs, sales days in the branches, and on-site support provided by travelling representatives and branches.
Assortment consulting and sample goods
Support for events with non-binding selections, consignment shipments for customer presentation, and advice by travelling representatives.
Trust & reputation

ranQ Trust Score of A. Ruppenthal AG: 4.3 out of 5.0

Trust Score4.3/ 5.0

Very high

x

Data basis 96% · As of November 2026

A. Ruppenthal AG scores 72.4 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.74.424%
  • 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.95.08%
A. Ruppenthal AG scores 89.3 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%
A. Ruppenthal AG scores 86.7 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).86.722%
A. Ruppenthal AG scores 71.4 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 35.71.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

A. Ruppenthal AG reaches a ranQ Trust Score of 4.3 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.8 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 November 2026.

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

Reviews

Aggregated rating

Aggregated rating
4.8
of 5

Aggregated from 6 reviews across all connected sources

Sources
GGoogle4.86
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Strehlgasse 4
8001 Zurich
Opening hours
Mon
08:00 - 12:00, 13:00 - 16:30
Tue
08:00 - 12:30, 13:00 - 16:30
Wed
08:00 - 12:30, 13:00 - 16:30
Thu
08:00 - 12:30, 13:00 - 16:30
Fri
08:00 - 12:30, 13:00 - 16:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-114.970.129
Founded
2009 · 17 years
Last commercial register change
February 18, 2026
Employees
11 to 20

Active in 1 of 26 cantons · 1 municipality

  • ZHZurich
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.
100.0
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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