GIT is ready to launch color grading service of “Cornflower Blue” Sapphire “Cornflower Blue” the word that refers to the most desirable color of blue sapphire. The literature explained the beauty of this color from the color of “Cornflower” and referred to the finest color of blue sapphire from Kashmir. The blue sapphire of superb quality from this classic mine has been described as a highly saturated, medium to medium-dark blue with violet tint. Furthermore, rather than being a clear stone, the sapphire must contain very fine minute particles inside. The presence of these fine particles does help create the stone’s internal sheen resulting the velvety appearance. Up to the present days, blue sapphires having such excellent characteristics can originate not only from Kashmir, but also from several other localities. GIT has conducted researches on the standardization of the famous color trade names of “Cornflower Blue” for many years. Finally, after the painstaking work, the ultimate standard of Cornflower blue sapphire is ready to launch in the trade in addition to the color grading of Pigeon’s Blood and Royal Blue services. Therefore, GIT gem testing laboratory proudly announces the official start of the Cornflower blue grading service to our valued clients from March 2016 onwards. The criteria for “Cornflower blue” grading - The stone subject for grading must be natural blue sapphire (with or without undergone conventional heat treatment) regardless of geographical origin. - Stone can be faceted in any shape with weight 0.25 ct or above. - Under standard equivalent daylight, the overall color must falls within the assigned range of the GIT master stones. - The stone must have enough minute inclusions to give velvety appearance but not too much to turn the stone looks hazy. - The stone must have proper cutting with at least 20% brilliancy area when views from face-up position.
Any stone possesses all criteria mentioned above, we will assign its color name in GIT gem testing report as “Velvet blue (Cornflower blue)”.
Click to see the Cornflower blue Sapphire Report sample
The Gem and Jewelry Institute of Thailand (Public organization) 140/1 - 3, 140/5 ITF - Tower Building, 1st - 4th and 6th Floor, Silom Road, Suriyawong, Bangrak, Bangkok 10500, Thailand Tel : (662) 634 - 4999 Fax : (662) 634 - 4970, www.git.or.th