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Figure 1. Natural, BeHT sapphire.  Figure 2. Synthetic, flame fusion sapphire

Understanding inclusions: part 2 sapphire

Inclusions are an integral part of identifying any range of treatments that can be applied to gemstones to boost value. JUNE MACKENZIE reports. Read more >>
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Figure 1. Natural ruby. Figure 2. Heat-treated ruby

Understanding inclusions: Part 1 Ruby

Inclusions are a gemmologist’s best friend. Why? Well, inclusions can determine whether a gemstone is natural, natural but treated for enhancement purposes, synthetic or man-made. JUNE MACKENZIE reports. Read more >>
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Image courtesy: The French Jewel Box

Art nouveau jewellery: exploring the legacy

Art Nouveau dominated jewellery design for only two or three decades up to World War 1 yet left a memorable legacy not only in the pieces that remain but also in the design and manufacture techniques it inspired. KATHRYN WYATT reports. Read more >>
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The flourish of art deco

Art Deco remains a popular style not just for engagement rings but also for other jewellery items. KATHRYN WYATT expands on her previous column by delving deeper into the Art Deco movement. Read more >>
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The decadence of art deco

Through the ages, gemmology and jewellery have both been heavily impacted by global societal trends. KATHRYN WYATT looks back at the defining Art Deco movement. Read more >>
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Understanding gemstone wear and tear

It may seem elementary but knowledge of correct gemstone treatment is essential for new retail staff. IAN DUN discusses types of gemstone damage and how to avoid them. Read more >>
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Developing a gemstone repair plan

Jewellers are often required to repair pieces that are essentially of unknown quality, making a thorough investigation and plan prior to commencement of work paramount. IAN DUN reports. Read more >>
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Repair tips for gem-set jewellery

An important skill for any bench jeweller is knowing how to minimise the risk of damage when working with gem-set jewellery. IAN DUN offers advice for managing gemstones in the workshop. Read more >>
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Image courtesy: Brendan Mccreesh, O’Neils Affiliated

Romancing the stone: Ultrasonic and Gemstones

The ultrasonic cleaner is an essential piece of equipment in a bench jeweller’s workshop. MEGAN AUSTIN lists basic guidelines and discusses the suitability of various gemstones for the cleaner. Read more >>
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Examples of Cornflower blue and Pigeon’s blood. Image courtesy: Greg C Grace

Pigeon’s blood and cornflowers: the truth behind gemstone colours

Many people have heard the terms ‘pigeon’s blood’ ruby and ‘cornflower blue’ sapphire but what do these descriptions mean? MEGAN AUSTIN explores some of the most famous gemstone colours in history and where they originate. Read more >>
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Image courtesy: Garry Holloway, Holloway Diamonds

Down Under Gemstones: The Aussie Diamond

Australia currently ranks as the world’s third-largest producer of diamonds by weight and is estimated to supply 20-million carats this year, mostly from the underground operation at the Argyle mine. MEGAN AUSTIN reports. Read more >>
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Zircon is prized for its diamond-like lustre, intense fire, brilliance and strong double refraction And it’s these qualities that separate it from its many imitators. Image courtesy: Brendan McCreesh/O'Neils Affiliated

Down Under Gemstones: Zircon

Zircon is the oldest mineral on earth and Australia boasts the oldest deposits dating back more than 4.4 billion years. MEGAN AUSTIN reports. Read more >>
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Monday, 27 March, 2017 04:02am
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