Gem Inclusions & the Symmetry of Crystals | Inside Out
A discussion of how inclusion patterns mimic crystallographic symmetry in ruby and sapphire.
Lotus • Articles from Lotus Gemology
Fiber-Optic Light in Gemology | Living in the Dark Ages
The role of fiber-optic lighting in gemological microscopy.
Cobalt-Doped Glass-Filled Sapphires | An Update
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
A 2006 mission to remote ruby and spinel localities in Tajikistan.
Identifying Yellow Sapphire Using the Blue Filter
Introducing the blue filter as a gemological tool to separate natural and Verneuil synthetic yellow sapphires.
Burma's Jade Mines | An Annotated Occidental History
The history of Burma's jade mines, as seen through Western eyes, from the earliest accounts through World War II.