The sagacity of the brilliant sapphires...  
 

In Astrogemmology, the blue sapphire represents the planet Saturn. Blue Sapphire is one of the gems in the family of Corundum. The word corundum originate from the Indian word ‘curund’ means ‘unknown hard material’.
Origin:

The name sapphire originated from the Latin word sapphires and the Greek word saphirose. 

Chemical Properties:
When subjected to heat, the low quality blue sapphire, at a temperature between 1500oC and 1600oC, will become bright  due to the aluminium oxide and iron particles in the gem. In chemistry, the blue sapphire is known as  aluminium oxide(A12 O3). These gems are sometimes sold as the original stones. It is very difficult to differentiate between the natural and artificial gems.

Hardness:
The hardness is measured as 9. The density is 4.0gm/em3. It resists chemical reactions because of its hardness.

Color and Shapes:
Colors of dark blue and light blue. Available in oval shapes, round shapes and in mixed cutting.
 
Resembling Stones:            
Blue sapphire, Blue Zircon, Water Sapphire and Lapis Lazuli.
 
Purpose:
Has the power to reduce laziness, varicose veins, pain in the legs due to contraction of veins, constipation and so on. Good for people who are handling machinery. 
One will experience improvement in wisdom and marital harmony.
 
Sapphire Production:
Blue sapphires are available from Burma, Sri Lanka and some parts of Kashmir in India. Sri Lankan Sapphires are very famous for their different varieties. Thailand, Cambodia, Australia, Montana (USA), Tanzania and Malawi are the other countries mining blue  sapphires.