How to check a real blue sapphire?
Gemstone for Virgo, born in September.
You can do this by visiting a legit jeweler, who will let you know its value. Real sapphire is deep blue in color and make sure that there are no bubbles/scratches available. Read more from http://www.ehow.com/how_7449164_tell-sapphires-real.html.
There is no way to determine if a blue Sapphire is real or not at home. A gemologist would have to perform a few tests to determine if it's a genuine Sapphire.