by Richard W. Hughes
Red Rain • Mozambique Ruby

Is the Mozambique stone the bejesus of bird's blood? Lotus Gemology's resident ruby wallah, Richard Hughes, weighs in on the state of the market and how Mozambique stacks up to historical heavyweights like Burma and Thailand/Cambodia.

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by E. Billie Hughes
Presidium Synthetic Ruby Identifier

In the lab and marketplace alike, gemologists and gem traders seek to separate natural ruby from synthetic with training and gemological equipment. But what if there was an easier, faster method?

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by Richard W. Hughes
Fun Down Under • Lenny Cram's Opal Mine • Lotus Gemology

The believe-it-or-not story of Australia's Lenny Cram and his opal mine in a mason jar.

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by Richard W. Hughes & John Koivula
Hunting the Mother Lode Abroad • Gemological Travel

When it comes to gemology, whether it is practiced in the lab or jewelry store, the importance of traveling to the source cannot be emphasized enough. Not only is information more accurate at the source, but the experiences will also make you a better salesperson.

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by Richard W. Hughes, with Loretta Castoro, Hpone-Phyo K. Nyunt & Lore Kiefert
FTIR in Gem Testing • FTIR Intrigue • Lotus Gemology

The use of Fourier-Transform Infrared Spectroscopy (FTIR) in gem identification, with examples of sapphire & jadeite.

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by Richard W. Hughes
Ruby, Pink Sapphire & Padparadscha • Walking the Line • Lotus Gemology

An examination of the problem of separating pink sapphire and padparadscha from ruby.

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by Richard W. Hughes, John Koivula & Warren Boyd
Emeralds from Russia • A Closer Look • Lotus Gemology

A brief look at the famous emerald and alexandrite from Russia's Ural Mountain mines.

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by John I. Koivula & Richard W. Hughes
Testing Yellow Sapphire • Passport to Obscurity • Lotus Gemology

The examination of a yellow sapphire provides a lesson in the power of gemological microscopy.

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by Richard W. Hughes & John I. Koivula
Seeing Red • Genetics & Color Vision • Lotus Gemology

Do men and women have the same ability to see red? The answer might shock you.

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by Richard W. Hughes
The Skin Game • Beryllium Diffusion in Sapphire

The early history of beryllium diffusion in sapphire, starting with the 2001 appearance of large numbers of padparadscha sapphires in the Thai gem market.

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