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Gem Hub

Welcome to Gem Hub, an educational resource for aspiring and professional gemmologists across a range of disciplines. Here you will find articles dedicated to enhancing your gemmological knowledge as well as informative features that delve deeper into specific topics.

If you would like to submit an article to Gem Hub, contact the editor.

Latest Gem Hub articles

15 Jun 2024

Gem Knowledge: What is Artificial Glass Paste in Antique Jewellery

14 Jun 2024

Gemmology Insights: Once in a Lifetime Inclusions for Gemmologists

23 May 2024

Gemmology Insights: Why is Peridot Described as Oily?

14 May 2024

Understanding Spinel: A Gemstone with Brilliance and Vibrancy

26 Apr 2024

Why Does the Study of Gemmology Matter?

25 Apr 2024

Gemmology Insights: What Makes Red Diamonds So Rare?

12 Feb 2024

Understanding Rare Non-Nacreous Pearls

12 Feb 2024

Beginner’s Guide: Understanding the Formation of Natural Glass

12 Feb 2024

Gemmology Insights: The Importance of Geology and Gemstone Formation

12 Feb 2024

Buying Guide: The Best Ways to Care for Gemstone Jewellery

1 Aug 2023

Gemstone Guide: Understanding Moonstones and Adularescence

1 Jul 2023

Buying Guide: Get to Know the Feldspar Family of Gemstones

Gem Knowledge: What is Artificial Glass Paste in Antique JewelleryGemmology Insights: Once in a Lifetime Inclusions for GemmologistsGemmology Insights: Why is Peridot Described as Oily?Understanding Spinel: A Gemstone with Brilliance and VibrancyWhy Does the Study of Gemmology Matter?Gemmology Insights: What Makes Red Diamonds So Rare?Understanding Rare Non-Nacreous PearlsBeginner’s Guide: Understanding the Formation of Natural GlassGemmology Insights: The Importance of Geology and Gemstone FormationBuying Guide: The Best Ways to Care for Gemstone JewelleryGemstone Guide: Understanding Moonstones and AdularescenceBuying Guide: Get to Know the Feldspar Family of GemstonesGemmology Insights: The Crown Jewels for the Coronation of King Charles III Gemstone Discoveries: Finding a new gemstone!5 Corundum Treatments In Rubies And SapphiresSix Alternative Birthstones: White Gemstone Options for AprilBeginner’s Guide: Understanding the Process of Diamond Grading Beginner’s Guide: 4 Interesting Inclusions In DiamondsBuying Guide: Get to Know the Different Types of Chalcedony5 Common Mistakes New Gemmologists MakeTop 5 Most Recognisable Gemstone Inclusions for GemmologistsBritish Gems: What Gemstones Can Be Found in Great Britain?Understanding Precious Black Opal and its PropertiesUnderstanding Zircon: A Misunderstood Gemstone with Amazing PropertiesBeginner’s Guide: Everyday Gemstone Identification in the Field Buying Guide: What Are the Different Types of Tourmaline?Understanding and Testing for Rare Natural CitrineUnderstanding the Shapes of Diamond Crystals The Importance of Gemstone Locations and Points of OriginThe World’s Most Famous Opal Gemstones Buying Guide: What Are the Different Types of Garnet?Buying Guide: What Are Hardstones?The Largest Blue Diamonds that Gemmologists Should KnowUnderstanding Boulder OpalThe History, Heritage and Hype behind Golconda DiamondsUnderstanding Specific Gravity and Why it is Vital to GemmologistsAmerican Gemstones: Benitoite from CaliforniaHistoric Uses of Topaz Gemstones in JewelleryAmerican Gemstones: Red Beryl from UtahAmerican Gemstones: Sweet Home Mine Rhodochrosite from ColoradoAmerican Gemstones: Yogo Sapphires from MontanaThe Famous Diamond Collection of Harry WinstonUnderstanding Play of Colour and Patterns in Opal GemstonesWhat Does It Mean When a Specimen Is Opalised?The Unusual History of Caesar’s RubyWhat is the Indian Style in Art Deco Jewellery?The Fascinating History of Antique Turquoise JewelleryTop 5 Most Famous Diamonds for GemmologistsGetting Started with Quartz InclusionsUnderstanding Iridescence in GemstonesHidden Treasures: Highlights of Gem-A’s Gemstones and Minerals CollectionUnderstanding the Cat’s Eye Effect in GemstonesUnderstanding Jade and its Importance in ChinaWhy Are Some Gemstones Associated with Bad Luck?The Extraordinary Siren of Serendip Blue SapphireGems&Jewellery Winter 2019 is Available to Read Now!A Journey into the Blues of Iolite from Tamil NaduExploring the Varieties of QuartzAn Exploration of Amethyst in Antique JewelleryGetting to Grips with Multi-Coloured GemstonesUnderstanding Red BerylBuying Guide: Which Gemstones are in the Beryl Family?Famous Gemstones: The Star of India SapphireThe Gems&Jewellery Autumn 2019 Issue Has Landed!Understanding Tanzanite5 Things to Consider before Starting the Gem-A Gemmology Foundation CourseWhat Career Paths Can Trained Gemmologists Take?The Famous Diamond Collection of Cardinal Mazarin (1602-1661)The History of Queen Victoria’s Sapphire and Diamond CoronetBuying Guide: Saltwater versus Freshwater PearlsWhat Should Be in the Ideal Gemmologist’s Toolkit?Gem-A Photographer of the Year Competition Returns for 2019!Understanding StibniteExplore the History of Garnet in Antique JewelleryWhat Are the Most Important Gemstone Producing Countries in the World?How to Identify Antique Edwardian JewelleryBreaking down the Misunderstandings about Precious CoralUnderstanding SugiliteBuying Guide: Coloured Diamonds from Least to Most ValuableGem-A Gemstone & Mineral Collection: Understanding SeleniteWhat Makes A Gemstone Rare? Diamond, Painite, Grandiderite and MoreWhat is the Link Between an Emerald and the Emerald-Cut?Gem-A Gemstone & Mineral Collection: Understanding Fossils as Decorative MaterialsBeginner’s Guide: What Are the Different Types of Opal?Top 10 Luxury Brands: The Jewellery Connoisseur’s Wish ListQuestions to Ask When Buying a Piece of Gemstone JewelleryGem-A Gemstone & Mineral Collection: Understanding DioptaseUnderstanding the Value of SapphiresField Trip: Gold and Gemstones on the Greek Island of NaxosBirthstone Guide: Tanzanite for Those Born in DecemberField Trip: A Visit to Gem-A ATC Institut de Gemmologie de MadagascarJournal Digest: Bumble Bee Stone from IndonesiaRetail Focus: Exploring the Emeralds of ColombiaInterview: Steve Moriarty of Moriarty’s Gem Arts on a Lifetime in GemstonesBirthstone Guide: Citrine for Those Born in NovemberInvestigating Fake Rough with Gem Testing Laboratory JaipurBirthstone Guide: Opal for Those Born in OctoberFocus on Gemstone Fluorescence: Looking for the LightThe Fascinating History of Platinum JewelleryUnderstanding Spinel: The Alternative August BirthstoneJournal Digest: Delve into the Colours of Rainbow Lattice SunstoneFancy Vivid Pink Diamond Steals the Show in 2018 Argyle TenderBirthstone Guide: Ruby for Those Born in JulyAn Afternoon in Antwerp’s Historic Diamond DistrictVegas: The Garden of Colourful DelightThe Journal of Gemmology, Volume 36, No. 2. Is Here!Fake News? Discovering ‘Alternative Facts’ in GemmologyThe ‘Cat’s Eye’ Phenomenon: Exploring ChatoyancyBirthstone Guide: Pearls for Those Born in JuneInsights and Reactions to De Beers’ New Lab-Grown Diamond Jewellery BrandReviving the Pearling Industry in the UAESurvivors – The Geology of DiamondsJournal Digest: Radiocarbon Age Dating on Natural PearlsBirthstone Guide: Emerald for Those Born in MayJurassic Jet: A Look to the Past to Preserve the FutureGold of the Scythians: Art, Culture and TechniquesBirthstone Guide: Diamond for Those Born in AprilAs Transparent as a Diamond? Why Blockchain Technology is Making HeadlinesMyths and Legends: Discover the Ancient Link Between Amber and the SeaCharacterising Mexican Amber From the Yi Kwan Tsang CollectionWhy is Bloodstone the Alternative March Birthstone?Coloured Gemstones from Brazil: Past, Present and FutureIndustry Leaders Unite for ‘Diamond Terminology Guideline’Gemstone of Passion: Padparadscha sapphireBirthstone Guide: Amethyst for Those Born in FebruaryGlass Simulants of Gems and Enhancement of Natural Gem Materials in the 16th CenturyBirthstone Guide: Garnet For Those Born In JanuaryDiscover Two Bewitching Cameos at the Natural History Museum, LondonChallenging Perceptions: Meet the Gem Cutters Thriving in NewcastleDiscover the Storytelling Powers of Master Gem CarversDiscovering Agates on the Shores of Cornwall, EnglandThe Source of Garnets Found at The Arikamedu Archaeological Site in South IndiaGold Fever in Arizona: Searching for Gold in the United StatesGreenland Ruby: The Mighty Aappaluttoq ArisesBirthstone Guide: Turquoise For Those Born In DecemberBirthstone Guide: Topaz for Those Born in NovemberInclusions Acting as Geological Fingerprints in Yellow Danburite from VietnamThe Role of Fingerprinting Technology in the Fight Against the Ivory TradeGraff Diamonds buys 1,109ct Lesedi La Rona Diamond for $53mAncient Sapphires and Adventures in CeylonAn Interview with Diamond Artist Angie CrabtreeThe Ethics of Coral Jewellery and Sourcing for GemmologistsThe Lifecycle Of A Sapphire RushSapphires of Ethiopia: The Forbidden Road to ChilaAn Update on Identification Features of Treated Baltic AmberBirthstone Guide: Tourmaline for Those Born in OctoberHow to Separate Natural from Synthetic Ametrine using Conventional EquipmentDiamond Dynamics With Bruce CleaverComplete Traceability and Ethical SourcingInvestigating Ammolite with Canadian Mining Specialist KoriteCalculating with CarbonProof of ProvenanceInvestigating the Opinion of Laboratory Reports and Geographic Origin of GemstonesFossicking in the OutbackRio Tinto Reveals The 2.11ct Argyle Everglow Red DiamondBirthstone Guide: Peridot for Those Born in AugustSynthetic Emeralds Grown by W. Zerfass: Historical Account, Growth Technology and PropertiesA Man of the Ocean: Diving for Organics with Eric FritzInvestigating Fake Pearls Made from Tridacna Gigas ShellsField Trip: The ‘Emerald Desert’ in Western AustraliaNatural vs Enhanced: Navigating Lapidary MaterialsHow to Assess the Value of an Opal: A Beginner’s Guide to PricingGem Careers: A Lifetime of ExpertiseExploring a Spectrum of Diamonds with the Aurora Pyramid of HopeCan Gemstones Bring Prosperity to Malawi?Exploring Inclusions in a Twelve Point Black Star SapphireWhat Makes the Alexandrite Colour-Change Effect so Special?Gem Central Sri Lanka – A Gem of an IslandBeginner’s Guide: What Can Emerald Inclusions Tell Us About Origin?Gem Central Delving into Organics with Maggie Campbell Pedersen FGA ABIPPNuummite – the Origin of ColourGem Central Exploring Ruby Treatments with Julia Griffith FGA DGA EGThe Most Underappreciated Gemstone? Why We Love Rock CrystalZircon from Vietnam: Properties and Heat TreatmentsThe Myths, Legends and Controversy Behind Ancient Preseli BluestoneA Passion For Working Fire ObsidianBirthstone Guide: Aquamarine for Those Born in MarchRuby and Pink Sapphire from Aappaluttoq, GreenlandField Trip: Exploring the Wonders of MyanmarThe Tale of the Mouawad-Tereschenko Blue DiamondWhitby Jet: A Discussion of its SimulantsAn Interview with Dr Jeffrey Post of the Smithsonian InstitutionExplore the Historic Significance and Mythology of AmethystField Trip: Screening for Tourmaline at the Oceanview Mine, CaliforniaJewellery History From Elizabeth I to Elizabeth Taylor with John BenjaminIdentifying Reconstructed Amber versus Natural AmberA Quick Guide to the Crown Jewels at the Tower of LondonDiving into the World of New Zealand Paua ShellsInside the World of Master Photomicrographer Danny SanchezUnderstanding Time-of-Flight Mass Spectrometry in GemsAn Exclusive Interview with Gem Cutter John DyerThe History of Diamonds in Engagement Rings