The Main Characteristics of Sapphires

Sapphire is characterized by uneven color, visible parallel hexagonal cylindrical arrangement, different shades of flat ribbon and growth lines. Poly-chip double crystal development, common shutter-style double crystal grain. The crack is usually along the double crystal plane. Strong dichroism, the world's different origin of sapphires in addition to the above common characteristics, but also because of the origin of different characteristics.

Sapphires and rubies are each other's sister gemstones, they are corundum minerals, in addition to diamonds on the Earth is the hardest natural minerals, the basic chemical composition of aluminum oxide. In addition to starlight effect, only translucent or transparent and bright color corundum can be called a gem. Red and chromium-containing corundum is known as a ruby because of its red hue, while blue sapphires are known to contain trace amounts of titanium and iron. In fact, all shades of corundum are commercially known as sapphires except for the red variety. Therefore, sapphire is not only refers to blue corundum gem, it has a complete blue series, as well as the yellow, pink, orange and purple fireworks sunset, and so on, these colored sapphires are collectively called colored sapphires.