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Tag Archives: heat treatment

The Perils of Paraiba– Jewelers Tears #2

Saturday, October 16, 2010

This tale of woe illustrates some of the risks and challenges we jewelers face in our fascinating business. Last year, I had seen this lovely 8.65 ct reddish purple cuprian elbaite tourmaline several times. Gem dealer Jack had tried mightily to tempt me with it, an unheated stone from the country of Mozambique in East […]

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Best Blue Sapphires by Country of Origin

Thursday, September 10, 2009

This third part in the series explores the relationship between country of origin and the color of blue sapphires. We focus on the “classic” sources for the best blue sapphires, including Kashmir, Burma, Ceylon, and the new kid on the block, Madagascar, discussing quality of color, heat treatment, and values plus information about the geology […]

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What is the Best Color for Blue Sapphire?

Thursday, September 3, 2009

Don’t miss this 4 part series on the blue sapphire.  We’ll discuss gem grading and market preferences for blue sapphire, the physical characteristics of natural sapphires that affect their color, some of the characteristics of stones from classic sources of sapphire including Ceylon, Burma, Kashmir, Madagascar, Thailand, Australia, and Montana, and the various methods of […]

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