Ruby is gem-quality red corundum. The color comes from traces of chromium. All other color varieties of gem-quality corundum are referred to as sapphire. Most gemological authorities expect a medium to medium dark-red color tone in a ruby

Sapphire is a precious gemstone, formed from a mineral called corundum. Blue sapphires get their colour from titanium and iron trace elements. On the Mohs scale of mineral hardness, blue sapphire rates 9 out of 10, so it is a very durable gem. The word 'sapphire' comes from the Greek word sapphirus which means blue

When you receive your  items don’t forget to give us feedback because you and your words are more precious then gemstone .in case you dislike or you have any problem with our item before leaving negative or neutral feedback give us a chance to resolve your problem a little bit difference of weight and measurements can be due to different measurements scales.