Ruby is a stone that comes in different colors. It is not, however, the same as a red diamond. Ruby will always be classified as a gemstone, and a red diamond will always be classified as an element of nature because it's made from graphite or coal. The key difference between these two stones is their composition. Rubies are minerals while diamonds are not. 

Telling rubies and red diamonds apart by their appearance is daunting since they look the same. So, how do you differentiate them?

Difference Between a Ruby and a Red Diamond

Red Diamond

A red diamond is one of the most unique and rarest forms of a diamond. Its red color makes it fancy and attractive. Red diamonds are made of pure carbon and are naturally occurring, and lack chemical impurities that cause color differences in other diamonds.

Finding a diamond with a rich red coloring is hard. However, when subjected to pressure and heat treatment, the color can be enhanced. Due to its rarity, only a few mines in Brazil, Africa, India and Australia produce a handful of red diamonds annually.


Just like diamonds, rubies are used as jewelry to create necklaces, engagement and wedding rings. Ruby is a red gemstone consisting of the corundum family. It is made from an aluminum crystalline form called corundum. It possesses a bold red color formed by chromium traces that replace aluminum in the mineral.

 Color difference and intensity determines whether a gemstone is a ruby, emerald or sapphire. Red corundum is a red diamond, while pink, blue or yellow colors form a sapphire. Ruby's red vibrant and saturated color increases its value and commands a higher market price.

 Rubies are not red diamonds, and unlike red diamonds, they are found in more countries. The higher the red color, the more valuable a ruby is. Naturally occurring rubies are more expensive than lab-processed rubies. Still not getting the difference? Reach out to Gold and Diamond Source gemstones experts for more information and purchases.