Gem Knowledge: What is Artificial Glass Paste in Antique Jewellery
Gemmologists often encounter simulants of natural gemstones, like artificial glass. Synthetic and composite stones of various kinds may be troublesome to identify, but those made of glass are among the most common and are usually easy to recognise. As Gem-A Tutor Pat Daly describes in the article below, glasses may also be natural stones, and […]
Gemmology Insights: Once in a Lifetime Inclusions for Gemmologists
The fascinating internal world of gemstones is an important area of study for gemmologists. Although some inclusions are common, others are far rarer and more elusive. Some professionals may go their entire lives without seeing these specific internal features in person. Here, Gem-A Tutor Pat Daly shares some ‘once in a lifetime’ inclusions and what […]
Gemmology Insights: Why is Peridot Described as Oily?
The description ‘oily green’ is sometimes used in connection with peridot. It is not intended as a criticism; it is a term which has been traditionally associated with the colour of this stone. Here, Gem-A Tutor Pat Daly explains why this descriptive moniker is used and what it tells us about this vibrant green mineral… Peridot is a beautiful gemstone that can be brown […]
Understanding Spinel: A Gemstone with Brilliance and Vibrancy
If you are new to gemmology, you may not be wholly familiar with the gem material known as spinel. Historically, these gems were confused with corundum, especially in red hues, which adds to its mystery and intrigue for gemmologists. Today, however, they are an important stone used in fine and high jewellery and deserve their own spotlight. Here, Gem-A tutor Pat Daly […]
Why Does the Study of Gemmology Matter?
The art and science of gemmology is a nuanced field that can lead to a fulfilling career. Gem-A tutor Pat Daly considers why gemmology matters, both as a topic of study and discussion and as a tool for commercial gain. Gemstones are exceptional products of the natural world which stand out from other materials by […]
Gemmology Insights: What Makes Red Diamonds So Rare?
Diamonds are the most important of the gemstones used for personal decoration, and none are more elusive than the red diamond. Here, Gem-A tutor Pat Daly breaks down the chances of finding a fancy red diamond, and what specific conditions are required to achieve this fiery natural hue. Most gem quality diamonds are near white […]
Understanding Rare Non-Nacreous Pearls
Beginner gemmologists are often surprised to discover how complex and varied pearls can be. What we see lining the shelves of fine jewellery stores are not the only biogenic materials of interest to gemmologists and trade professionals. Gem-A tutor Pat Daly explores non-nacreous pearls in this article, including conch and Melo melo, and takes a […]
Beginner’s Guide: Understanding the Formation of Natural Glass
From volcanic eruptions to lightning strikes, the formation of natural glasses is a fascinating process of interest to gemmologists. Gem-A tutor, Pat Daly, uncovers the conditions that cause obsidian, rainbow obsidian and fire obsidian to form and explains what professionals in the gem and jewellery trades should look out for. Most solid natural materials on […]
Gemmology Insights: The Importance of Geology and Gemstone Formation
With few exceptions, accessible gem and decorative materials are formed on Earth as a result of geological processes. An understanding of these natural movements and changes can aid gemmologists in their learning and professional practice. Here, Gem-A tutor Pat Daly describes some key elements of gemstone formation, touching on chemistry, high pressures, rock types and […]
Buying Guide: The Best Ways to Care for Gemstone Jewellery
Do you need expert gemstone jewellery care advice from a gemmology expert? Here, Gem-A tutor Pat Daly shares his top gemstone jewellery cleaning tips and offers some advice on caring for your precious gemstones for long-lasting heirloom sparkle. Owners and collectors of gem-set jewellery soon find that they have accumulated a substantial financial and emotional […]
