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Ruby
Ruby is the most valuable variety of the corundum mineral species, which also includes sapphire.
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Sea Urchin–Like 3D Radial Fissures in a Heated Mong Hsu Ruby
Examination of a 1.34 ct ruby reveals a unique inclusion formed during heat treatment.
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Evil Eye in a Flux-Healed Mong Hsu Ruby
The mirror reflection of a flux-healed fissure from a step pavilion facet in a Mong Hsu ruby creates an interesting inclusion scene.
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Devitrified Glass “Pom-Poms” in Ruby
Devitrified glass inclusions resembling pom-poms or sea urchins are observed in a clarity-enhanced ruby.
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The 3309 cm–1 Series in Sapphire and Ruby: A Focus on FTIR Peak Position Variation
Investigates the correlations between peak positions in the 3309 cm–1 series with trace element concentrations for ruby, metamorphic and basalt-related blue sapphire, and laboratory-grown sapphire.
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Ruby with Synthetic Overgrowth Lining Cavities
An unusual area of granular texture lining the cavity of a ruby indicates synthetic overgrowth.
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Arzakite Inclusion in Ruby from Mogok
A report on the first documented arzakite inclusion in a Mogok ruby.
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Natural-Looking Inclusions in a Ramaura Synthetic Ruby
Milky clouds and flux inclusions in a synthetic ruby create a challenge for identification.
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Fireworks in Ruby
An unheated purplish red ruby cabochon displays a white double-star phenomenon.
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Update on Inclusion Scenes in Mozambican Rubies
GIA researchers identify zircon inclusions in several Mozambican ruby samples, potentially impacting origin determination criteria used for sources of East Africa ruby.
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Update on Liberian Ruby
Ten Liberian corundum samples are examined in GIA’s Tokyo laboratory.
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