Understanding Boulder Opal Deep in the Australian outback miners labour tirelessly through tons of rock in the hope of finding a fine source… Read more...
Understanding Specific Gravity and Why it is Vital to Gemmologists Specific Gravity is a vital test that all gemmologists need to be aware of. Here, Gem-A Gemmology Tutor, Dr Juliette… Read more...
Historic Uses of Topaz Gemstones in Jewellery Jewellery historian and valuer, John Benjamin FGA DGA FIRV, shares insights into the history of topaz gemstones in jewellery, including… Read more...
Understanding Play of Colour and Patterns in Opal Gemstones Did you know the colours and patterns in an individual opal gemstone can drastically alter its value and desirability? Here,… Read more...
What Does It Mean When a Specimen Is Opalised? Senior Gemmology Tutor Pat Daly FGA DGA explores the phenomenon of opalisation, how it occurs and where you can expect… Read more...
The Fascinating History of Antique Turquoise Jewellery In his third Gemstone Conversations column for Gems&Jewellery, Jewellery Historian and Valuer John Benjamin FGA DGA FIRV explores the fascinating… Read more...
Getting Started with Quartz Inclusions Do you know your calcite inclusions from your dumortierite, epidote, fluorite and rutile? Here, Charles Bexfield FGA DGA EG explores… Read more...
Understanding Iridescence in Gemstones Iridescence has to be one of the most mesmerising and magical optical effects seen in gemstones. But have you ever… Read more...
Hidden Treasures: Highlights of Gem-A's Gemstones and Minerals Collection Locked away in the vaults of Gem-A HQ in London is an assortment of breath-taking treasures that form Gem-A’s Gemstones… Read more...