Unique Moiré-Pattern Metallic Inclusion in Paraíba Tourmaline
“Conch Shell” in Diamond
Fireworks in Ruby
Pyritic Inclusions in Oregon Sunstone
Diamond Within a Diamond Within a Diamond
Iridescent Pen Shell
In Memoriam: Jean Claude Michelou
The gem and jewelry industry mourns the loss of one of its true leaders.
“Soap Bubbles” in Yellow Sphene
Rare Gadolinite Gemstone
Diffusion-Induced Blue Spinel-Like Layer on Natural Sapphire
Gold-Plated Gold
Spring 2024 Auction Highlights
A Visit to Clarity Diamond’s CVD Facility
Multilayered Laboratory-Grown Diamond
Gems & Gemology at Ninety: Consistency and Change
Polymer-Impregnated Turquoise
A large “Persian” turquoise cabochon was impregnated with a material that was also present in cavities on its base.
Characterization of Emeralds from a Historical Deposit: Byrud (Eidsvoll), Norway
An emerald deposit at Byrud, in southern Norway, yielded significant quantities of crystals and gem rough in the late 19th and early 20th centuries.
Sapphire and Garnet from Kalalani, Tanga Province, Tanzania
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