Posts Tagged ‘color zoning’

What is the Best Color for Blue Sapphire? Part 2

Saturday, September 5th, 2009

The characteristics of any gemstone are directly related to the crystal from which it is cut, so it’s important to understand how the physical nature of the crystal influences the color of  the gem. In the case of blue sapphire, one of the more common crystal forms is an elongated six sided dipyramidal form, as […]

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