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


Birthstone Guide: Sapphire for September

Birthstone Guide: Sapphire for September

Legend describes it as a stone of purity, honesty, trust and prosperity, bringing inner peace and protection to its wearer. Sapphire - the darling gemstone of royalty and bridal jewellery - is the birthstone for those born in September.

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Fossicking in the Outback

Fossicking in the Outback

Carmen Garcia-Carballido FGA DGA L.Geology MSc. EurGeol travelled to the southern hemisphere to find out more about the opals and sapphires of eastern Australia.

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A Passion For Working Fire Obsidian

A Passion For Working Fire Obsidian

Tom Dodge, a retired geologist living in Arizona, has been an avid rock collector for 57 years. Here, he takes a look at fire obsidian, an enchanting and little-known material.

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Field Trip: Screening for Tourmaline at the Oceanview Mine, California

Field Trip: Screening for Tourmaline at the Oceanview Mine, California

Claire Mitchell FGA DGA takes a hands-on look at the Oceanview Mine in the Pala mining district in California, USA.

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Natural vs Enhanced: Navigating Lapidary Materials

Natural vs Enhanced: Navigating Lapidary Materials

Helen Serras-Herman FGA guides us through the varieties of all-natural and enhanced gem materials, highlighting key treatments and their impact on the marketplace.

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Synthetic Emeralds Grown by W. Zerfass: Historical Account, Growth Technology and Properties

Synthetic Emeralds Grown by W. Zerfass: Historical Account, Growth Technology and Properties

Guy Lalous ACAM EG investigates the hisotrical account of synthetic emeralds grown by W. Zerfass. Summarising a technical article from The Journal of Gemmology, focus is centred upon the growth technology and geological properities of one of the worlds most beautiful gemstones.

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A Man of the Ocean: Diving for Organics with Eric Fritz

A Man of the Ocean: Diving for Organics with Eric Fritz

In a recent trip to our London headquarters, Eric Fritz FDGA DGA, Gem-A's North America Manager, stopped by for an industry insider Q&A, offering theoretical and practical guidance on organic materials. Sarah Salmon finds out more...

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Birthstone Guide: Ruby for Those Born in July

Birthstone Guide: Ruby for Those Born in July

Ruby the red variety of corundum occurs as bright-red, red, purplish- or brownish-red, and deep pinkish-red hues, coloured by chromium. It is the birthstone for those born in July.

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Field Trip: The Emerald Desert in Western Australia

Field Trip: The Emerald Desert in Western Australia

Author, jewellery designer and Gems&Jewellery contributor Joanna Angelett describes her recent gemmological trip to the 'Emerald Desert' in Western Australia.

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Investigating Fake Pearls Made from Tridacna Gigas Shells

Investigating Fake Pearls Made from Tridacna Gigas Shells

This article by Guy Lalous ACAM EG summarises a technical article from The Journal of Gemmology discussing fake pearls made from Tridacna shell.

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Birthstone Guide: Alexandrite for Those Born in June

Birthstone Guide: Alexandrite for Those Born in June

Julia Griffith FGA DGA EG, gemmology and diamond tutor at Gem-A, explains why the rarity and chameleon-like qualities of alexandrite make it one of the world’s most desirable gemstones.

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Exploring Inclusions in a Twelve Point Black Star Sapphire

Exploring Inclusions in a Twelve Point Black Star Sapphire

Guy Lalous ACAM EG summarises a technical article from The Journal of Gemmology discussing a giant 12-rayed black star sapphire from Sri Lanka with asterism caused by ilmenite inclusions

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Gem Central Sri Lanka - A Gem of an Island

Gem Central Sri Lanka - A Gem of an Island

An extraordinary number of Gem-A and NAJ members came to this month's Gem Central to hear Colin and Hilary Winter share their love and passion for Sri Lanka. Barbara Kolator FGA DGA reports on the evening...

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The Myths, Legends and Controversy Behind Ancient Preseli Bluestone

The Myths, Legends and Controversy Behind Ancient Preseli Bluestone

Sarah Steele FGA DGA discusses the unusual history of ancient Preseli bluestone...

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Birthstone Guide: Emeralds for Those Born in May

Birthstone Guide: Emeralds for Those Born in May

Emerald - the symbol of rebirth and bringer of good fortune and youth...

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Gem Central Delving into Organics with Maggie Campbell Pedersen FGA ABIPP

Gem Central Delving into Organics with Maggie Campbell Pedersen FGA ABIPP

Gem-A president and organics expert Maggie Campbell Pedersen presented the April Gem Central at Gem-A headquarters. Angharad Kolator Baldwin reports on this fascinating evening...

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Nuummite – the Origin of Colour

Nuummite – the Origin of Colour

This article by Guy Lalous ACAM EG summarises a technical article from The Journal of Gemmology discussing the origin of colour and conditions of formation in violet-to-blue Nuummite from Simiuttat, Greenland...

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Gem Central Exploring Ruby Treatments with Julia Griffith FGA DGA EG

Gem Central Exploring Ruby Treatments with Julia Griffith FGA DGA EG

Gem-A gemmology and diamond tutor Julia Griffith FGA DGA EG led a gem central titled Exploring the Differences between Glass In-filled, Flux Healed and Lead Glass-filled Ruby, in an informative and engaging gem central evening. Julia summarises the evening here for those that missed out...

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Birthstone Guide: Rock Crystal for Those Born in April

Birthstone Guide: Rock Crystal for Those Born in April

Julia Griffith FGA DGA EG, gemmology and diamond tutor at Gem-A, reveals the birthstone for April...

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