The Extraordinary Siren of Serendip Blue Sapphire

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At 422.66 carats, the Siren of Serendip blue sapphire is a sight to behold. Here, Rui Galopim de Carvalho FGA DGA shares the story behind this fascinating (and exceptionally large) gemstone and describes the process of setting it into a beautiful white gold and diamond necklace. Sri Lanka, former Ceylon until 1972, was historically known […]

Gems&Jewellery Winter 2019 is Available to Read Now!

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We are pleased to announce that the Winter 2019 issue of Gems&Jewellery is now available to Gem-A Members in print and online. Our quarterly magazine includes exciting updates from the world of gemstones and jewellery, interviews and features from industry experts and the latest Gem-A news. On the cover of this season’s issue is the winning photograph […]

A Journey into the Blues of Iolite from Tamil Nadu

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Gem-A graduate Nishka Vaz FGA shares an abridged version of her stellar Gemmology Diploma project, which focuses on the various colourations of iolites from Tamil Nadu, India. Few gemstones can boast myriad colours like iolite, one of the most uniquely pleochroic gemstones known. Pleochroism is the name given to the optical effect where a gemstone […]

Exploring the Varieties of Quartz

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At Gem-A we are fascinated by quartz. This amazing mineral can occur in a wide variety of colours and can be a treat for the eyes when fine specimens are carved, cut or set in jewellery. Here, Gem-A Tutor Pat Daly takes us through a whistle-stop tour of some of the most distinctive varieties of […]

An Exploration of Amethyst in Antique Jewellery

An Exploration of Amethyst in Antique Jewellery

In his second of a series of Gemstone Conversations columns for Gems&Jewellery, jewellery historian and valuer John Benjamin FGA DGA FIRV considers how amethyst has been used by jewellery designers throughout history. This transparent variety of crystalline quartz is surely one of the most distinctive and recognisable gemstones ever used in decorative jewellery. It has […]

Getting to Grips with Multi-Coloured Gemstones

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Many of us marvel at the feat of nature that is the multi-coloured gemstone. Here, Gem-A Gemmology Tutor Lily Faber FGA DGA EG takes us through the basics of three popular multi-coloured gemstones and explains how they can be identified. Multi-coloured gemstones are a fantastically colourful type of gem that display two or more colours […]

Understanding Red Beryl

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Gem-A is pleased to have some fascinating red beryl specimens in the historic Gem-A Gemstone & Mineral Collection. Here, Gem-A senior gemmology tutor Rona Bierrum FGA DGA EG, explores what makes this rare member of the beryl family so special. Red beryl is the rarest variety of the large beryl family whose better-known varieties include […]

Buying Guide: Which Gemstones are in the Beryl Family?

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The beryl family of gemstones is fantastically versatile as it includes gems that come in a veritable rainbow of colours. For those of you who may think that you’ve never even heard of a beryl, think again! Within the beryl group are a slew of well-known gems that are regularly used in jewellery. Gem-A gemmology […]

Famous Gemstones: The Star of India Sapphire

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Look at any list of the top 10 most famous gemstones in the world and you will undoubtedly come across the Star of India. Here, we find out more about this incredible star sapphire and discover its fantastical history, which reads like the plot of a Hollywood movie. Within the Hall of Gems at the […]

The Gems&Jewellery Autumn 2019 Issue Has Landed!

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We are pleased to announce that the Autumn 2019 issue of Gems&Jewellery is now available to Gem-A Members and students in print and online. Our quarterly magazine includes exciting updates from the world of gemstones and jewellery, as well as interviews and features from industry experts and the latest Gem-A news. The Autumn issue begins […]

Upcoming Events

Limited tickets available. Secure your place now.
Gemmological Instruments
Meet the Author
Rui Galopim de Carvalho
Thursday, June 5
Decorative plate made of Tortoiseshell which is a material produced from the shells of the larger species of tortoise and turtle.
Gemmological Instruments
Meet the Author
Maggie Campbell Pedersen
Thursday, June 12

Christmas Closure

The Gem-A office will be closed from 3pm Wednesday 24th December 2025 for the holidays, reopening 9am Friday 2nd January 2026.

Season’s greetings from all of us at Gem-A!