In a Nutshell:

both sapphires and rubies belong to the Corundum family, meaning they share the same mineral composition but display a variety of colors. Essentially, sapphires encompass all the colors of corundum except for red, while rubies specifically denote the red varieties within the corundum spectrum.
A corundum is a mineral and a crystalline form of aluminum oxide (Al₂O₃). It is one of the hardest known minerals and is highly valued as a gemstone. Let’s explore in detail:

Chemical Composition:

Crystal Structure:


Mohs Scale Rating:

Refractive Index:



As mentioned quickly above Sapphires are Corundums that come is all colors excluding red, that includes dark pinks.

Sapphire hues aren’t just diverse; they’re also graded by their rarity and quality. Among these hues, some possess such exceptional rarity that they’ve earned their own distinctive names. Take, for instance, the Padparadscha, a captivating sapphire exhibiting a breathtaking sunset-like coloration (My personal favorite stone). Additionally, within the spectrum of blue sapphires, those esteemed for their superior saturation and hue are often referred to as Royal blue sapphires. These gems boast a mesmerizing deep blue-violet tone, symbolizing elegance and allure.

Rubies, are red Corundums, they encompass shades that exclude variations of pinks and oranges. Among them, the most esteemed red hue is often referred to as Pigeon Blood. This exquisite shade boasts a beautiful darker red tone, yet retains a subtle translucence, allowing light to pass through, enhancing its allure and brilliance.

Thank you for reading this post, I hope you have learned something new, if you have any question feel free to leave a comment and I will happily reply.

See you soon!

One Response

Leave a Reply

Your email address will not be published. Required fields are marked *