by Gustav Tschermak von Seysenegg
Discovery of rutile silk in sapphire

In 1878, the noted Austrian mineralogist, Gustav Tschermak von Seysenegg [1836–1927], was the first to properly identify silk in corundum, finding it to be composed of the mineral rutile (TiO2). An English translation of his landmark paper is included, along with the original German version.

Read More
by E. Billie Hughes
Lotus Gemology report lookup guide

The best way to check the authenticity of a Lotus report is with online report verification.

Read More
by Lotus Gemology

Lotus Gemology warns that oiled rubies, sapphires and spinels are entering the Bangkok wholesale market in increasing numbers. Most, but not all, of these gems are originating from Burma.

Read More
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.

Read More
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?

Read More
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.

Read More
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.

Read More
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.

Read More
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.

Read More
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.

Read More
Back to top