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The most valued blue sapphires are velvety blue to violetish blue, in medium to medium-dark tones. Sapphires with these qualities command the highest prices per carat. Less valuable blue sapphires might also be grayish, too light, or too dark.
The most highly valued blue sapphires are velvety blue to violetish blue, in medium to medium dark tones. Preferred sapphires also have strong to vivid color saturation. The saturation should be as strong as possible without darkening the color and compromising brightness.
Blue sapphires range in size, and large blue sapphires are more readily available than large rubies. Sapphire Quality Factors: The Comprehensive Guide Read Article
Sep 1, 2014 · GIA’s Sapphire Buyers Guide provides the quick tips you need when shopping for one of these sought-after gems. Find out why color is the most important indicator of value, what “silk” means in reference to a sapphire, and which color sapphires are named “Padparadscha.”.
Reports on the microscopic, chemical, and spectroscopic features that differentiate the high-quality Baw Mar sapphire from “classic” gem-quality Burmese sapphire.
The most highly valued blue sapphires are velvety blue to SAPPHIRE ˜ CLARITY Sapphires often have some inclusions. Sometimes they contain intersecting silk inclusions that create a star when the stone is cut as a cabochon. This phenomenon, called asterism, can appear as a star with 4, 6 or 12 rays. Prices can drop if inclusions threaten
Blue sapphire belongs to the mineral species corundum. It can be a pure blue but ranges from greenish blue to violetish blue. The name “sapphire” can also apply to any corundum that’s not red and doesn’t qualify as ruby, another corundum variety.
Jan 26, 2018 · In some cases, the value of a sapphire depends strongly on its geographic origin. This article details the origin data GIA has collected for blue sapphire and describes its methodology for using the data in geographic origin determination.
Kane R.E. (1982) The gemological properties of Chatham flux–grown synthetic orange sapphire and synthetic blue sapphire. G&G , Vol. 18, No. 3, pp. 140–153, http://dx.doi.org/10.5741/GEMS.18.3.140
Sapphire is generally known as a blue gemstone but surprisingly it comes in a wide range of colors and quality variations. In general, the more intense and uniform the color is, the more valuable the stone. Sapphires that are not blue are known as fancy sapphires, and may be any color—except red (which is a ruby).
