Ruby
Ruby is the most valuable variety of the corundum mineral species, which also includes sapphire.


An unusual area of granular texture lining the cavity of a ruby indicates synthetic overgrowth.
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A report on the first documented arzakite inclusion in a Mogok ruby.
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Milky clouds and flux inclusions in a synthetic ruby create a challenge for identification.
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An unheated purplish red ruby cabochon displays a white twelve-rayed double-star phenomenon.
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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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Ten Liberian corundum samples are examined in GIA’s Tokyo laboratory.
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Examination of a heart-shaped ruby reveals a zinc glass filler.
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Fingerprints resulting from a flux-assisted heating process give a purple-red ruby a unique appearance.
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An overview of the treatment process of ruby and pink sapphire from Greenland and its effect on inclusion scenes and chemistry.
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