Welcome to the Gem-A Blog. Here, you will find up-to-date information on the latest news and trends, exclusive features and regular reports from a host of gemmology insiders. Each month we will share highlights from our printed publications and take you behind-the-scenes at our popular Gem Central events. Would you like to submit an article for the Blog? Email us on editor@gem-a.com


A Connection to Coral

A Connection to Coral

With updated commentary from December 2017, Gem-A president Maggie Campbell Pedersen FGA ABIPP, explains how coral may not inspire the same emotional outpouring as ivory, but its delicate ecosystem needs to be protected.

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Ancient Sapphires and Adventures in Ceylon

Ancient Sapphires and Adventures in Ceylon

Helen Molesworth FGA, managing director of the Gübelin Academy and a professor of the history of jewellery, takes the reader back in time to Seilam, now Sri Lanka.

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Inclusions Acting as Geological Fingerprints in Yellow Danburite from Vietnam

Inclusions Acting as Geological Fingerprints in Yellow Danburite from Vietnam

Guy Lalous ACAM EG explores an updated summary of the inclusions in yellow danburite from Luc Yen, Vietnam, by Le Thi-Thu Huong, Kurt Krenn and Christoph Hauzenberger in The Journal of Gemmology in addition to examining its characterisation by optical means and micro-Raman spectroscopy.

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The Lifecycle Of A Sapphire Rush

The Lifecycle Of A Sapphire Rush

In the last 12 months, an exceptional sapphire rush in eastern Madagascar saw thousands of people searching for precious treasure in one of the poorest places on earth. Rosey Perkins GG, an independent gemmologist based in London, shares this report from two visits to the island nation.

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Portrait of a Diamond

Portrait of a Diamond

Painter Angie Crabtree has built a reputation as one of the most sought-after diamond artists, literally recreating every sparkling facet in incredible detail. Here, she shares her passion for painting gemstones (and the occasional watch movement) with Gems&Jewellery...

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Andrew Cody Awarded Honorary FGA at Gem-A Conference 2017

Andrew Cody Awarded Honorary FGA at Gem-A Conference 2017

Gem-A is thrilled to announce that Andrew Cody, founder of leading Australian opal company, Cody Opal, has been awarded an honorary FGA in recognition of his exceptional services to gemmology and the wider industry.

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Quick Guide to Opals

Quick Guide to Opals

As more and more retailers react to the growing popularity of opals in commercial jewellery collections, Gem-A Instruments Manager Samantha Lloyd FGA EG offers a quick, but essential guide to opal value factors.

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An Update on Identification Features of Treated Baltic Amber

An Update on Identification Features of Treated Baltic Amber

Guy Lalous ACAM EG explores a detailed characterization of Baltic amber samples treated in experiments by Wang et al.(2014) in The Journal of Gemmology, whilst discussing the criteria for identifying heat-treated amber using standard gemmological instruments, FTIR and Raman spectroscopy.

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Graff Diamonds buys 1,109ct Lesedi La Rona Diamond for $54m

Graff Diamonds buys 1,109ct Lesedi La Rona Diamond for $54m

The second largest gem-quality diamond ever discovered has been sold privately to Graff Diamonds for a staggering $53 million.

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Birthstone Guide: Tourmaline for Those Born in October

Birthstone Guide: Tourmaline for Those Born in October

Gem-A gemmology and diamond tutor, Julia Griffith FGA DGA EG, looks at tourmaline, the enchanting rainbow-coloured birthstone for October.

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The Role of Fingerprinting Technology in the Fight Against the Ivory Trade

The Role of Fingerprinting Technology in the Fight Against the Ivory Trade

Barbara Kolator B.Sc. M.Sc. FGA DGA EG speaks with Dr. Leon Barron, senior lecturer in Forensic Science at Kings' College London about some innovative fingerprinting technology with implications for gemmologists, antique dealers, and wildlife conservationists worldwide.

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The Forbidden Road to Chila

The Forbidden Road to Chila

Simon Bruce-Lockhart FGA DGA EG, travels to Ethiopia to uncover the truth behind the Aksum sapphire fields and find out why this restricted-access area is such a fascinating place for gemstone discovery.

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Speaker in the Spotlight: Q&A with Patrick Dreher

Speaker in the Spotlight: Q&A with Patrick Dreher

Master Carver, member of the Board of Trustees of the German Gemstone Museum and board member of the Federal Association of the Gemstone and Diamond Industry, Patrick Dreher is one of the highly anticipated speakers at the Gem-A Conference 2017 not to be missed.

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How to Separate Natural from Synthetic Ametrine using Conventional Equipment

How to Separate Natural from Synthetic Ametrine using Conventional Equipment

Guy Lalous ACAM EG summarises the discovery of features that could be used to distinguish between natural and synthetic ametrine from The Journal of Gemmology; from the orientation of growth striations to the interference patterns caused by twinning.

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Complete Traceability and Ethical Sourcing

Complete Traceability and Ethical Sourcing

Columbia Gem House president, Eric Braunwart, explores the growing popularity of American gemstones and discusses the importance of traceability, ethical sourcing and the millennial consumer with Sarah Jordan.

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Investigating Ammolite with Canadian Mining Specialist Korite

Investigating Ammolite with Canadian Mining Specialist Korite

Korite is at the forefront of ammolite mining and production, with plans now in place to expand its operation in Canada. Sarah Jordan speaks to the company's president, Jay Maull, to discover how a booming Chinese market, Feng Shui and adventurous jewellery designers are supporting this fascinating gemstone.

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Investigating the Opinion of Laboratory Reports and Geographic Origin of Gemstones

Investigating the Opinion of Laboratory Reports and Geographic Origin of Gemstones

This article by Guy Lalous ACAM EG summarises the nature of opinions on geographical origin reports from The Journal of Gemmology discussing ways to improve the helpfulness and transparency of gemmological testing and grading reports.

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Can Gemstones Bring Prosperity to Malawi?

Can Gemstones Bring Prosperity to Malawi?

Deborah Craig FGA DGA, head of the Africa Team at International Women in Mining (IWIM) and board member within the organisation, reports on her recent trip to Malawi.

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Rio Tinto Reveals The 2.11ct Argyle Everglow Red Diamond

Rio Tinto Reveals The 2.11ct Argyle Everglow Red Diamond

It is always an exciting time of year when Rio Tinto unveils what has been discovered at its Argyle diamond mine. Typically, this is beautiful pink diamonds, with the occasional purplish violet tones. Even rarer still are the fancy red diamonds, that remain a mysterious quantity even today.

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Birthstone Guide: Peridot for Those Born in August

Birthstone Guide: Peridot for Those Born in August

Lily Faber FGA, gemmology and diamond tutor at Gem-A unveils the striking tones of Peridot, the August birthstone; a fitting beauty of nature to compliment the vibrant and zesty 2017 Pantone Colour of the year, 'Greenery'.

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