There are many types of Sapphire in nature.Blue Sapphire is one of them.Sources Of Blue Sapphire is Bangkok ,Thiland, Sri-lanka, Africa and Kashmir. Natural Blue Sapphire is rare and costly stone.Blue Sapphire . How to Wear Blue Sapphire:-Blue Sapphire can worn in Gold or pancha dhaatu(Mix of 5 metal) in Thursday morning b/w 4 to 7(Brahma muhurat).This ring is suitable for Men having ring sizes between 15 to 30 as per Indian ring size standards. For same product in small ring size (For women) between 6 to 15 search on amazon for this Size of this ring is easily ajdustable by hand. Gemstone is left open from the back side for rays to pass through and reach finger properly. High quality making in our own state-of-the-art manufacturing unit gives this ring a beautiful look. Gemstone certified by a Well reputed laboratory.