Lotus • Articles from Lotus Gemology
Cobalt-Doped Glass-Filled Sapphires | An Update
Cobalt-Doped Glass-Filled Sapphires | An Update
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- Thanong Leelawatanasuk, Wilawan Atichat, Visut Pisutha-Arnond, Pornsawat Wattanakul, Papawarin Ounorn, Wimon Manorotkul & Richard W. Hughes
The history of glass-infilling in blue sapphire, along with a description of the latest treatment generation developed in Chanthaburi, Thailand.
Ruby and Spinel in Tajikistan | Moon Over the Pamirs
Ruby and Spinel in Tajikistan | Moon Over the Pamirs
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- Richard W. Hughes & Vincent Pardieu, with Guillaume Soubiraa & Dana Schorr
A 2006 mission to remote ruby and spinel localities in Tajikistan.
Identifying Yellow Sapphire Using the Blue Filter
Identifying Yellow Sapphire Using the Blue Filter
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- Richard W. Hughes
Introducing the blue filter as a gemological tool to separate natural and Verneuil synthetic yellow sapphires.
Burma's Jade Mines | An Annotated Occidental History
Burma's Jade Mines | An Annotated Occidental History
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- Richard W. Hughes
The history of Burma's jade mines, as seen through Western eyes, from the earliest accounts through World War II.