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


Zircon from Vietnam: Properties and Heat Treatments

Zircon from Vietnam: Properties and Heat Treatments

This article by Guy Lalous ACAM EG summarises a study on the gemmological and physical properties of brown zircon from the Central Highlands of Vietnam...

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The Tale of the Mouawad Blue Diamond

The Tale of the Mouawad Blue Diamond

Jack Ogden FGA looks into the story of the world's second largest blue diamond, the Mouawad Blue Diamond, previously known as the Tereschenko Blue Diamond...

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Whitby Jet: A Discussion of its Simulants

Whitby Jet: A Discussion of its Simulants

Sarah Steele FGA DGA discusses the many simulants of one of Britain’s most famous native gemstones...

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Birthstone Guide: Aquamarine for Those Born in March

Birthstone Guide: Aquamarine for Those Born in March

The blue hues common to this beautiful stone are fitting considering the Latin aqua mare means ‘water of the sea’. Legends describe it as the mermaid’s stone, bringing luck to sailors and protecting them from the perils of the ocean...

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Ruby and Pink Sapphire from Aappaluttoq, Greenlandibit

Ruby and Pink Sapphire from Aappaluttoq, Greenlandibit

This article by Guy Lalous ACAM EG summarises a study of the geology, gemmological and physical properties of rubies and pink sapphires from Aappaluttoq, one of the last pristine spots on the planet not far from the arctic circle...

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Field Trip: Exploring the Wonders of Myanmar

Field Trip: Exploring the Wonders of Myanmar

Gem-A member Patricia Campion reports on a recent gemmological field trip to Myanmar. Sharing her experiences of gemstone market places, the Yangon's Gem Museum and seeing mushroom tourmaline for the first time...

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An Interview with Dr Jeffrey Post of the Smithsonian Institution

An Interview with Dr Jeffrey Post of the Smithsonian Institution

Claire Mitchell FGA DGA talks to Dr Jeffrey Post, chairman of the Department of Mineral Sciences and curator of the National Gem and Mineral Collection at the Smithsonian Institution, about advanced gem testing, the Hope diamond and the importance of donations to the museum...

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A Quick Guide to the Crown Jewels at the Tower of London

A Quick Guide to the Crown Jewels at the Tower of London

Andrew Fellows FGA DGA takes a look some of the myths and legends associated with one of the world’s most famous gem collections, the Crown Jewels...

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Birthstones Guide: The Meaning Behind February Gemstone Amethyst

Birthstones Guide: The Meaning Behind February Gemstone Amethyst

Julia Griffith FGA DGA EG, Gemmology and Diamond Tutor at Gem-A, introduces amethyst. Writing about the history of this beautiful stone and informing us about its gemmological properties...

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Reconstructed Amber Broken Down

Reconstructed Amber Broken Down

This article by Guy Lalous ACAM EG summarises a technical article from The Journal of Gemmology discussing the identification criteria for early (pre 2009) and current (post 2009) reconstructed amber, based on documented samples at the National Gemstone Testing Center (NGTC) in Beijing...

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From Elizabeth I to Elizabeth Taylor with John Benjamin FGA DGA

From Elizabeth I to Elizabeth Taylor with John Benjamin FGA DGA

John Benjamin FGA DGA, jewellery consultant, contributor to BBC’s Antiques Roadshow, author and historian, presented the January Gem Central at Ely Place. Angharad Kolator Baldwin reports on his fascinating lecture...

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Diving into the World of New Zealand Paua Shells

Diving into the World of New Zealand Paua Shells

Paua shells are the archetypal New Zealand gem - possibly even better known than its nephrite jade, known as 'greenstone' or Kauri copal, the fossilised resin or sap of the Kauri Tree. Here, Maggie Campbell Pedersen FGA looks to the ocean to learn more about paua shell, how it is farmed and how it is used in jewellery design...

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Inside the world of photomicrographer Danny Sanchez

Inside the world of photomicrographer Danny Sanchez

Award-winning photographer Danny Sanchez GG, a speaker at the 2016 Gem-A Conference, reveals the secrets of photomicrography, the equipment he swears by and his favourite gemstones to photograph...

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Getting to Grips with GemTOF Technology

Getting to Grips with GemTOF Technology

This article by Guy Lalous ACAM EG digests a techincal article from The Journal of Gemmology and discusses the capabilities of Laser Ablation Inductively Coupled Plasma Time-of-Flight Mass Spectrometry...

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An Exclusive Interview with Gem Cutter John Dyer

An Exclusive Interview with Gem Cutter John Dyer

Belinda Morris talks to renowned and much-admired lapidary John Dyer, one of the speakers at the 2016 Gem-A Conference, about the science and art of gem cutting...

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The History of Diamonds in Engagement Rings

The History of Diamonds in Engagement Rings

Jack Ogden FGA takes a look at the history of diamonds being used in engagement rings. You might be a little surprised at how far the custom dates back...

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