Top 5 Most Recognisable Gemstone Inclusions for Gemmologists
Gemstone inclusions are a fascinating area of study for gemmologists But they can also be helpful in determining the identity of a stone and, in some cases, may be indicative of its origin. You may instantly recognise some inclusions if you have completed the Gem-A Gemmology Foundation or Gem-A Gemmology Diploma. Here, Tutor Pat Daly […]
British Gems: What Gemstones Can Be Found in Great Britain?
Gem-A and the British Isles As the Gemmological Association of Great Britain, we have a special interest in gemstones that emerge from our home nations of England, Scotland and Wales. Here, Gem-A Tutor Pat Daly FGA DGA takes a closer look at the metals, gems and ornamental materials found within the borders of Great Britain, […]
Understanding Precious Black Opal and its Properties
Understanding what makes opals precious We often hear about black opal, but what causes this dark body colour and what contributes to its market value? Here, we take a deep dive into precious black opal and discover where it is mined, how it can be treated and what simulants and synthetics are worth looking out […]
Understanding Zircon: A Misunderstood Gemstone with Amazing Properties
Zircon is one of the world’s most misunderstood gemstones Regularly confused with and/or mistakenly linked to man-made cubic zirconia, it is a gemstone many people should learn more about. Gem-A Gemmology Tutor, Pat Daly, explains what makes zircon gemstones so special and explores the properties that make this underappreciated gemstone a great choice for jewellery. […]
Beginner’s Guide: Everyday Gemstone Identification in the FieldÂ
Beginner’s Guide: Everyday Gemstone Identification in the Field When it comes to everyday gemstone identification techniques, there are some tricks you can learn to aid your efforts in the field. In some cases, however, gemstones can be elusive and tricky to pinpoint. Here, Gem-A Gemmology Tutor Pat Daly offers some insights into gemstone identification and […]
Buying Guide: What Are the Different Types of Tourmaline?
Tourmaline is a mineral group that includes more than a dozen species A few of them can be fashioned into gem-quality faceted stones that are perfect for use in fine and high jewellery collections. Here, Gem-A Gemmology Tutor, Pat Daly, delves into the rainbow world of tourmaline gemstones and explains the types you should be […]
Understanding and Testing for Rare Natural Citrine
Finding natural yellow citrine is a challenge Although citrine gemstones are abundant in jewellery, it’s unusual to find natural yellow citrine on the market. Here, we explore the causes of colour in rare natural citrine, its properties, localities, and the testing methodologies gemmologists can use to pinpoint this quartz variety in the field. Quartz (silicon […]
Understanding the Shapes of Diamond CrystalsÂ
Diamonds belong to the cubic crystal system When you first start learning about diamonds, you will discover that these carbon-based gems belong to the cubic crystal system. Diamonds can be unearthed in numerous forms that belong to this system. Here, Gem-A Gemmology Tutor Pat Daly explains more about the shapes of diamonds.  All crystals belong […]
The Importance of Gemstone Locations and Points of Origin
Gemstone points of origin matter. Here’s why… Some gemstone species only have a single point of origin, while some gem types are limited to a specific commercial locality that determines their value and desirability. Others are linked to certain locations to increase their importance or achieve a higher price. Here, Gem-A Gemmology Tutor Pat Daly FGA […]
The World’s Most Famous Opal GemstonesÂ
Dive into the remarkable world of famous opals Explore nine of the most famous opal gemstones with Gem-A gemmology tutor Lily Faber FGA DGA EG. Here, we guide you through some of the most fantastical opals to be uncovered in recent centuries, including extraordinarily large gems and examples with vibrant play of colour. Opals are, […]
