Blue Sapphire Quality Grading

Finally sapphires that have a very dark and opaque blue color are considered b quality grade.

Blue sapphire quality grading.

Any blue sapphires that have a slight gray undertone fit into the a category. The 3 keys to color grading are identifying hue tone and saturation. Sapphires with these qualities command the highest prices per carat. 1 2 carat sapphires in fine quality are quite rare.

The charts illustrate the wide variations in color gradings for sapphire and rubies as well as the three main factors which make up sapphire s color. Sapphire terms and grading terminology explained on reports issued by the natural sapphire company. Blue sapphire rings and custom sapphire jewelry and discover what makes the natural sapphire company the world s greatest collection of natural sapphires. Weight and metal quality gem grading especially for the sapphire.

For a sapphire is to be called blue its secondary colors e g. Therefore visibility of sapphire inclusions are graded at eye level not under a 10x loupe. The most valued blue sapphires are velvety blue to violetish blue in medium to medium dark tones. As if the high values are balancing precariously on a razor edge a move away from these deep cornflower blues towards the darker midnight blues causes a quick and spectacular crash in price that can mean thousands of dollars when dealing with larger sapphires.

Blue sapphire clarity grading sapphires are more prone to have inclusion in comparison to diamonds due to the way the crystals are formed. Sapphires that have secondary colors in greater quantity would be classified as greenish blue purplish blue violet etc. In grading gem colors we normally emphasize the dominant hue by capitalizing it. Add any written documentation you have showing the garbo provenance letter from your grandfather bill of sale etc.

The standard for blue sapphires. The charts explain the color grading system used by all gia g g. Most common inclusions of a blue sapphire are silk needles fingerprints feathers crystals or cavities. Gemologists in their color grading of sapphires rubies.

Less valuable blue sapphires might also be grayish too light or too dark. The hue should be royal blue the tone should be deep blue and the saturation should be even throughout the gem. For blue sapphire. Green or purple must not account for more than 15 of its color.

Color is graded on these factors face up on a white surface.