12/11/2018
• Kathryn Wyatt
What do emerald, aquamarine, heliodor and morganite have in common? They are all from the group of gemstones called beryl and are coloured by trace impurities. KATHRYN WYATT reports.
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02/10/2018
• Lucy Johnson • Staff Journalist
Christie’s Geneva will host an auction next month featuring the Pink Legacy, the largest pink diamond the auction house has ever seen.
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01/10/2018
• Jennifer Suggett
Topaz has been known as a gemstone for at least 2,000 years. It occurs in a range of colours and has hardness of 8 on the Mohs scale, however it can be brittle. JENNIFER SUGGETT investigates.
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16/08/2018
• Barbara Kosmowska-Ceranowicz
The gemmological notion of precious and decorative stones also includes amber, which is a mineral regardless of its organic origin.
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16/08/2018
• Elzbieta Sontag
Is it possible for amber to fascinate us even more than it already does with its warmth, magic, unique range of hues and natural patterns? The short answer is “yes” according to ELZBIETA SONTAG.
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16/08/2018
• Coleby Nicholson • Managing Editor
While patented diamond cuts are not new, one supplier has created a niche specialising in fancy cuts and patented stones. COLEBY NICHOLSON visited Lili Diamonds in Israel to discover why.
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15/08/2018
• Stacey Lim
While the red hues of rubellite maintain a steady appreciation, the interest and value of blue and green tourmaline was reignited with the discovery of ‘Paraíba’ tourmaline, STACEY LIM reports.
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01/08/2018
At the 2017 Tucson Gem Show, author Andrew Lucas was approached by Ethiopian dealers attending a seminar given by Shane McClure, Global Director, Colored Stone Svc. They proposed to Lucas and McClure to conduct research on Ethiopian gemstone deposits for GIA.
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01/08/2018
• Stacey Lim
Boasting an array of colour and colour combinations unrivalled by any gem species, one can find tourmaline in shades of almost every hue. Throughout history this gem was often confused with other minerals until tourmaline was identified as its own mineral species in the 1800s. STACEY LIM reports.
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04/07/2018
• Stacey Lim
Until recent times, spinel was an underappreciated gem with little consumer recognition. However, as demand for ruby alternatives increase, renewed interest and enthusiasm for spinel grows. STACEY LIM reports.
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14/06/2018
• Martin Foster
Recently, the swiss watch industry has been caught in a storm of unstable demand and even one of the world’s leading trade shows couldn’t deny it. MARTIN FOSTER reports.
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13/06/2018
• Stacey Lim
One of the oldest minerals found in the Earth’s crust, zircon has long being used as a substitute for diamonds. STACEY LIM provides some background.
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