Collectors from around the world descended on Christie's Maharajas & Mughal Magnificence auction of the jewels from the Al-Thani Collection on 19 June.
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Recounts an expedition to Mozambique’s important deposits of ruby, spinel and tourmaline, which have yet to be fully explored.
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The rigours and often-harrowing conditions of gemmology field expeditions are no match for a 30-year Marine veteran with a love of gems.
Read MoreNational Retail Federation predicts a strong increase in holiday sales; U.S. ban on Myanmar ruby and jade lifted; diamond market report.
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A GIA team travels the world to discover and document what happens as coloured gems travel from mine to market.
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An inside look at Mogok's gem markets and cutting industry.
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An expedition to the Mogok area of Myanmar documents the current state of their ruby mining, markets and cutting industries. This exotic land, known as the "Valley of Rubies", is one of the world’s most famous gemstone sources.
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Explores the emergence of the Luc Yen area as a producer of corundum, spinel, tourmaline and other coloured stones.
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The first in the series, "Sapphire: A Crystal With Many Facets," this article details the properties and history of this mineral corundum, from its first industrial applications as a mechanical timepiece component to its earliest synthetic growth techniques.
Read MoreHydrothermal synthetic red beryl has been produced for jewellery applications.
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