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Ruby
Ruby is the most valuable variety of the corundum mineral species, which also includes sapphire.
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Ruby and Sapphire from Muling, China
An emerging corundum deposit in northeastern China is discussed.
Rubies from a New Deposit in Zahamena National Park, Madagascar
A field expedition from GIA Bangkok explores a new ruby deposit and collects specimens for study.
GIA Field Gemologist Documents Madagascar Ruby Rush
Join GIA’s recent field expedition to the ruby rush in Madagascar’s Zahamena National Park.
GIA Field Gemologists seek Ruby, Sapphire, and Spinel in Mogok, Myanmar
Venture deep underground with GIA’s Field Gemologists Vincent Pardieu and Dr. Aaron Palke as they explore the geology of Mogok’s ruby, sapphire, and spinel deposits.
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GIA Field Gemologists Visit Chimwadzulu Ruby Mine, Malawi
Visit Malawi’s Chimwadzulu ruby mine with GIA Field Gemologist Vincent Pardieu.
Discover Mozambique’s Montepuez Ruby Mine with GIA’s Field Gemologists
See inside the world’s most productive ruby mining operation with GIA’s field gemology team.
GIA Field Gemologists Seek Ruby in Mogok, Myanmar
Venture into Mogok, Myanmar, in search of ruby with GIA’s field gemologists.
Romancing the Source: Pakistan
Accompany GIA field gemologists on a true gemstone mining adventure in the mountains of Pakistan, where beautiful gems are mined and cut. Travel with us on the old Silk Road used by Marco Polo, where the Himalaya, Karakoram, and Hindu Kush mountain ranges collide.
Crimson Prince Ruby from Namya
Rubies and Sapphires from Snezhnoe, Tajikistan
This large marble-hosted occurrence in the Pamir Mountains is a potentially productive source of corundum, including ruby with a bright red color reminiscent of “pigeon’s blood” Burmese rubies.
Dual-Color Double Stars in Ruby, Sapphire, and Quartz: Cause and Historical Account
Examines a form of asterism comprising two six-rayed stars, one white and one that exhibits the stone’s bodycolor. Firsthand accounts and a survey of patent documents reveal that diffusion has been used to create or enhance this optical phenomenon in synthetic and possibly natural corundum since the 1950s.
Analysis of Synthetic Ruby Overgrowth on Corundum
Analysis of synthetic ruby overgrowth on corundum, using analysis of inclusions, UV-Vis-NIR and EDXRF spectroscopy, and LA-ICP-MS.
