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Gerd Dreher agate lily and Patrick Dreher citrine mouse
Gem Virtuosos: The Drehers and Their Extraordinary Carvings

A look at the artistic heritage of the Drehers, an influential family of gem carvers in Idar-Oberstein, Germany.

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Artificially Induced Colour in Amethyst-Citrine Quartz

A new and rather unusual gem material and possible treatments are discussed.

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The Natural Formation and Occurrence of Green Quartz

How amethyst under certain conditions may turn green rather than the expected citrine-yellow.

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"Modern" Jewellery: Retro to Abstract

A review of mid-20th century jewellery styles.

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