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Faceted blue zircons
Reversible Colour Modification of Blue Zircon by Long-Wave Ultraviolet Radiation

Determines whether blue zircon, inadvertently altered to brown by exposure to long-wave UV radiation, can be restored to its original colour through the use of incandescent light.

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Diamond
Article
Fancy Colour Diamond Care and Cleaning Guide

Learn about fancy colour diamond's durability and how to care for your fancy-coloured diamond jewellery.

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Article
Secrets to Keeping Your Diamond Sparkling

These tips will help you make sure your diamond shines its best for any occasion.

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Chipped Diamond
Article
How to Protect Your Diamond from Chipping

Find out more about what causes a diamond to chip, and 8 tips on how you can avoid chipping your diamond.

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Mohs Scale
Article
Alexandrite Care and Cleaning Guide

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

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Ruby
Article
Ruby Care and Cleaning Guide

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

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Garnet
Article
Garnet Care and Cleaning Guide

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

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Faceting Large Gemstones

The techniques for cutting and polishing gemstone giants.

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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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Article
Kunzite Care and Cleaning

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

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