Rubies are one of only four true precious stones, including diamonds, sapphires and emeralds. They have adorned the royalty of cultures all over the world and throughout the ages; they are the most valuable variety of the mineral corundum, which includes sapphires. The word “ruby” originates from the Latin rubeus,... Read More

Rubies are one of only four true precious stones, including diamonds, sapphires and emeralds. They have adorned the royalty of cultures all over the world and throughout the ages; they are the most valuable variety of the mineral corundum, which includes sapphires. The word “ruby” originates from the Latin rubeus, meaning “red” or “red stone”. Prized for the deep red colour, sub-adamantine lustre (incredible brightness) and notable durability these stones were first dredged from riverbeds of Southeast Asia. The deep red colour of this stone comes from chromium (Cr³⁺) within the crystal structure. High amounts of chrome will give rubies a deeper red colour, like the highly sought after “Pigeon Blood,” whereas less chrome will give a more pinkish ruby. While even small gem quality rubies are scarce, large gem quality rubies are rarer and often more valuable than similar sized diamonds.