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Search Results - Gemstones

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Image courtesy: Greg C Grace

Gemstones
Colour Investigation: Beryl

The beryl family includes some of the world’s most loved gemstones. STACEY LIM reports that varieties of beryl are prized for their hardness, transparency and range of beautiful colours. Read more »
Image courtesy Hamid Bros Gem Merchants

Gemstones
Colour Investigation: Alexandrite

Emerald by day and ruby by night, alexandrite is perhaps the best example of the magical colour-changing variety of gemstones. STACEY LIM reports. Read more »
International Colored Gemstone Association

Gemstones
Packing a colourful gemstone punch

In a difficult climate, coloured gemstones are offering jewellers an opportunity to stand out. EMILY MOBBS investigates current market trends for this colourful sector. Read more »

Gemstones
Colour investigation: Opal

The quality of colour can be dissected into vibrancy, evenness, pattern and, in some cases, uniqueness; however, what on earth causes it? This series is dedicated to exploring the different causes of colour in gemstone minerals. STACEY LIM reports. Read more »
The GIA's new service traces a diamond's origin, and includes an app for consumers

News
New GIA service traces diamond’s origin

The Gemological Institute of America (GIA) has introduced a program that allows retailers to track the origin of select polished diamonds, potentially providing a unique selling opportunity and improved consumer confidence. Read more »
Figure 1. (left) Inclusion consisting of a liquid phase with a vapour bubble. Figure 2. (right) Polariscope-revealed inclusion

Gemstones
Understanding inclusions: part 5 tourmaline

Always colourful, always durable; tourmaline is a jewellery-industry favourite. JUNE MACKENZIE reports. Read more »
Figure 1. (left) Corrosion tubes. Figure 2. (right) Lamellar twinning

Gemstones
Understanding inclusions: part 4 tanzanite

Compared to other gemstones, tanzanite is young. JUNE MACKENZIE discusses this popular gemstone that Tiffany & Co brought to market in the 1960s. Read more »
Figure 1 (left). Synthetic flux emerald. Figure 2 (centre). Hydrothermal emerald. Figure 3 (right). Natural emerald

Gemstones
Understanding inclusions: part 3 emerald

Understanding emerald inclusions is a vital part of the sales process. JUNE MACKENZIE reports. Read more »
Figure 1. Natural, BeHT sapphire.  Figure 2. Synthetic, flame fusion sapphire

Gemstones
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 »
Figure 1. Natural ruby. Figure 2. Heat-treated ruby

Gemstones
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 »
Image courtesy: The French Jewel Box

Gemstones
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 »

Gemstones
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 »


 


Wednesday, 20 September, 2017 11:55am
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