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Gubelin Gemmology

Name: Gubelin Gemmology
Address: Lucerne, CH
Telephone: +41414291717

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Gubelin Gemmology

Gübelin Gem Lab | Gübelin Academy The House of Gübelin operates one of the world’s most respected gemmological laboratories.

In its locations in Lucerne, Hong Kong and New York, the Gübelin Gem Lab provides analyses of coloured gemstones, diamonds and pearls. Its highly esteemed Gemmological Reports are relied upon by famous auction houses, gem traders, collectors, connoisseurs, royal families and others who seek an expert, independent opinion. To share its expertise with the greater public, Gübelin opened the Gübelin A

cademy. Geared to professionals as well as enthusiasts and connoisseurs of coloured stones, the Academy offers a series of modular programmes providing a unique fast-track training into the wonderful world of coloured gems.

12/06/2026

Gubelin Gem Lab are happy to announce our participation at the Jewellery & Gem ASIA Hong Kong from the 18 th to 21 st of June 2026.

Orders that are submitted by 2 pm at our booth or 5 pm at our office in Central, may then be collected in the afternoon two days later. Please contact us for more details.

During the fair period, we equally accept goods directly at our Gem Lab in 1004-1005, 10/F., China Building, Central, Hong Kong from 16th to 23rd June 2026, office hours in Central are from 9:00am to 6:00pm.

For an appointment with the Gübelin Gem Lab, please email us at [email protected] or call us at +852 2868 2781.

10/06/2026

Jeremejevite is among the rarest gem minerals encountered in nature.

Recently, we had the pleasure of testing a particularly attractive example of 17ct.
First discovered in Siberia in the late 19th century, jeremejevite is a borate mineral typically found in small crystals, with facetable gem-quality material being exceptionally scarce. Its delicate blue to colorless hues and remarkable transparency make fine specimens highly sought after by collectors and connoisseurs alike.
Because of its rarity, every gemmological examination of jeremejevite offers a fascinating glimpse into one of the more unusual corners of the gemstone world.

Photo: Riwin Lertsinathichai, Gübelin Gem Lab, Bangkok

With kind permission of Zam Refai, Zam Gems (Pvt) Ltd. Zam Gems

09/06/2026

Do you appreciate organic materials in jewellery?

Coral is a beautiful material with an organic origin. Coral is actually formed from the skeletons of marine animals called polyps. Calcium carbonate is deposited in the form of branch-like structures. Through a biomineralisation process, a microcrystalline material known as coral is formed. Under close observation, one sees that coral has a pitted surface with parallel markings. Once it is polished, its lustre is vitreous, just like the lustre of the majority of crystalline gem materials.
If you are interested in seeing a variety of gem materials, come visit the Gem Wall at the Gübelin Gem Museum, where you can explore a variety of organic, inorganic, natural, and synthetic gem materials.
Gübelin Gem Museum in Lucerne, where every stone tells a tale and every detail is a clue waiting to be uncovered.
Featured here is a beautiful 7.23 ct polished free form coral from our Museum Gem Wall.
Opening hours: Wednesday, 9:00–17:00
Private Guided tours: By appointment

Book your ticket using link in bio

03/06/2026

Quo vadis?
Rutile “arrowheads” in this sapphire point in multiple directions, creating a visually intriguing and somewhat disorienting internal landscape. Yet, while their orientation may seem ambiguous, the combined evidence from inclusions, spectroscopy and chemical analysis clearly identifies this gemstone as an unheated sapphire from Sri Lanka.
Photomicrograph: Klaus Schollenbruch, Gübelin Gem Lab, Lucerne
Photo: Supreeya Mukpimai, Gübelin Gem Lab, Bangkok

02/06/2026

In our Level 2 Coloured Gem Professional course, we learn what an orogeny is and how orogenies are related to gemstone formation. Tanzanite formed approximately 550 million years ago during the Pan-African orogeny. Tanzania is the only source of this unique gem.

Also in Level 2, we explore the marvels of gemstones and how they interact with light. In this case, Tanzanite exhibits trichroism, displaying different colours along its three crystallographic axes.
We invite you to explore our courses and be empowered in the trade through knowledge. Register now for September courses.

To register, contact us at: [email protected]

27/05/2026

Very large gemstones often present particular challenges when it comes to photomicrography. Yet this aquamarine, weighing over 700 carats, revealed an inclusion well worth the effort. A broad network of thin films is intersected by clouds of minute channels, creating the impression of moth-like internal structure defined by the interaction of thin films and densely distributed micro-channels.

Photomicrograph: Klaus Schollenbruch, Gübelin Gem Lab, Lucerne
Photo: Fashiel Tamimi Yanos, Gübelin Gem Lab, HongKong

26/05/2026

Can you guess an emerald’s origin from its inclusion scenery?

Origin determination is far more complex than it may seem. While microscopy is an essential tool in gemmology, origin should never be determined based on microscopic features alone. Advanced analytical methods play a critical role in reaching a reliable conclusion.

That said, inclusions can offer remarkably helpful clues. Certain features can point us in the right direction and help narrow down possibilities.

It’s a fascinating challenge for gem lovers and professionals alike. Take a close look… what’s your guess?

Image 1: Three-phase inclusions with jagged outlines in an emerald from ?
Image 2: Mica (biotite) platelets, growth tubes and blocky two-phase
inclusions in an emerald from ?
Image 3: Blocky two-phase inclusions in an emerald from ?
Image 4: Iridescent thin films in an emerald from ?

Want to better understand these inclusion scenarios and how they relate to origin? Join our Coloured Gem Professional courses now!

19/05/2026

Photomicrography Workshop
Keen on learning how to take your own pictures of the inner world of gemstones?

Immerse yourself in the captivating world of gemstone photomicrography. Next month the Gübelin Academy hosts its workshop on the photomicrography of gemstones. In this 2-day hands-on workshop we will guide you through the art of capturing the mesmerizing beauty hidden within gemstones. You will learn techniques for photographing gemstone inclusions using a microscope, revealing the breathtaking, often unseen details that lie beneath the surface.

Designed for gemstone lovers of all levels, whether you’re just starting out or already have experience, this workshop offers something for everyone. Don't miss this unique opportunity to explore and capture the inner world of gemstones!

Photomicrography of Gemstones Workshop
Date: 29-30 June 2026
Duration: 2-day workshop
Price : CHF 1,390
Location: Gübelin Gem Museum, Lucerne
Language: English
Prerequisites : Students are asked to bring their own laptop or tablet

$Just a FissureEven a simple fracture can reveal unexpected beauty. This fissure in a spinel from Tajikistan displays a s...$

14/05/2026

Just a Fissure
Even a simple fracture can reveal unexpected beauty. This fissure in a spinel from Tajikistan displays a striking sequence of colours that differs from the familiar rainbow spectrum. Instead of following the typical order produced by dispersion, the colours transition from colourless through yellow, orange, red and violet-blue, returning again to yellow—while green remains notably absent. This unusual palette is the result of thin film interference, rather than refraction and dispersion.

Photomicrograph: Klaus Schollenbruch, Gübelin Gem Lab, Lucerne
Photo: Larissa Frank, Gübelin Gem Lab, Lucerne

13/05/2026

Gübelin Gem Lab Bangkok – accelerated testing service

Gübelin Gem Lab is pleased to announce a special testing period in Bangkok, with 5-days turnaround time only, supported by our overseas teams.

This initiative offers convenient local access, streamlined processing, and an accelerated turnaround time. We warmly invite you to take advantage of our services during this period.

Testing for all major gemstones will be available with a standard turnaround time of five business days. Express services may also be available upon request, subject to availability and additional fees.

🗓Dates: 13–27 May 2025
(Submission cut‑off times may vary depending on workload.)
⏰Opening hours: 9:00 a.m. – 6:00 p.m.
📍Location: 2nd Floor, Room 211
45/1 Soi Silom 19, Silom Road
Silom Sub‑district, Bangrak District
Bangkok 10500, Thailand

📱Local phone: +66 2 267 5442
📱Local mobile: +66 98 257 1049

For organizational purposes, we kindly ask that you contact us in advance to arrange an appointment (by phone at +66 2 267 5442 or email at [email protected]).
We would also appreciate an estimated number of stones you plan to submit for testing.

Adresse

Lucerne

Öffnungszeiten

Montag	09:00 - 17:00
Dienstag	09:00 - 17:00
Mittwoch	09:00 - 17:00
Donnerstag	09:00 - 17:00
Freitag	09:00 - 17:00

Telefon

+41414291717

Webseite

https://linktr.ee/gubelingemmology

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