Blue Sapphire is a bright Blue to purple coloured gemstone which is one of the very extravagant representations of the planet Saturn in the Jyotish shastra. Being pleasant to look at as well as endowed with properties to terrify anyone who sees it, is the natural instinct of the gem. It is termed as Neelamani in Sanskrit and Neelamin Hindi.

Associated day: Saturday
Associated planet: Saturn
Associated month: September
Associated zodiac sign: Saggitarius

Composition of Blue Sapphire

Colour: Light Blue / Blue / Deep Blue

Shape / Cut: Square

Origin / Source: Sri Lanka (Ceylon)

Finish: Super Fine

Certification: Certified Natural Blue Sapphire (Neelam) Stone of best quality from Sri Lanka (Ceylon) with Gem Testing Report from reputed laboratory.

Chemical Formula: Al2O3
Hardness: 9
Crystal System: Hexagonal
Refractive Index: 1.76 – 1.77
SG: 3.9 – 4.1
Transparency: Transparent to Opaque
Double Refraction: 0.0008
Luster: Vitreous to adamantine
Cleavage: None, but may exhibit parting
Mineral Class: Corundum

The color of Blue sapphire is usually caused by minute inclusions of the metal cobalt and lead. These impurities are often responsible for causing a sapphire to fluorescent, which can be helpful in its identification. It is also pleochroic, and will sometimes display a lighter and more intense color when viewed at different angles