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A view of downtown Hong Kong – with a freeway traveling through it.
Article
U.S. Retailers Continue to Cite ‘Challenging’ Environment; Synthetic Melee Detected

Economists are recognising that the decline in middle-class purchasing power is directly affecting some consumer products – including jewellery.

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A scattering of rough diamonds
Article
De Beers Optimistic as Sales Revive; Luxury Houses Remain Cautious

De Beers holds largest cycle (sight) in more than two years. Luxury sales have begun to rise again after a negative year.

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Rebecca Buys sits on her motorcycle.
Article
‘Hippie’ Designer-Appraiser Follows Her Heart and Re-ignites Local Alumni Chapter

Rebecca Buys, GG, with a fulfilling career as a designer and appraiser, guides GIA alumni opportunities in San Diego, California.

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 Hand holding tube-shaped boulder opal
Article
Queensland Opal Fields: Home of the Unique Australian Boulder Opal

Boulder opal is becoming more and more popular. Australia’s central Queensland is home to more than a dozen of sources of this stone. Come with GIA field gemmologists to find out more about this unique gem.

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Gemstone Durability: Design to Display

A treatise on the design, display, care and repair of fine gemstones.

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Opal
Article
Opal Description

Opal is known for its unique display of flashing rainbow colours called play-of-colour. There are two broad classes of opal: precious and common. Precious opal displays play-of-colour, common opal does not.

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Opal
Article
Opal Care and Cleaning Guide

Learn about opal's durability and how to care for your opal jewellery.

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Abstracts; Winter 1991

This article, from the Winter 1991 issue of Gems & Gemmology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemmology.

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