Sapphire is a variety of corundum, which chemically is highly allochromatic aluminum oxide (Al2O3). It has a hardness of 9 on the Mohs scale.
The term sapphire (without other adjectives) identifies the blue-blue variety of corundum.
18 kt white gold ring with white diamonds and natural oval cut sapphire.
Gold weight: 8.4 grams
Sapphire weight: 80ct
Diamond weight: 250ct
Being a handcrafted jewel, the weights could undergo very small variations. All the characteristics will be indicated in the certificate of ownership that accompanies the jewel.