3mm Ceylon Sapphires. Sri Lanka has long been a major source of fine quality Sapphire gemstone. Kashmir Sapphire is said to be the best in the world, for the depth and softness of its blue, called “velvet blue”, but the mine was exhausted 100 years ago. Of course, not all “Kashmir” Sapphires were of superb quality. All gemstone mines produce a range of qualities, a range of colour tones. The Sri Lankan Sapphires in these White Gold earstuds are not of a deep blue, but rather a particularly bright mid-blue, very attractive.