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Gemstone Ruby
Ruby is a pink to deep red gemstone from the mineral group corundum, which also includes sapphire. It is considered one of the rarest gemstones in the world and has been valued for centuries for its captivating color, exceptional hardness, and durability, making it ideal for precise cutting.
Ruby gets its characteristic red color from trace amounts of chromium.
Sapphires are closely related to rubies, but their color shades are influenced by different trace elements.
Gemstone Ruby
Ruby is a pink to deep red gemstone from the mineral group corundum, which also includes sapphire. It is considered one of the rarest gemstones in the world and has been valued for centuries for its captivating color, exceptional hardness, and durability, making it ideal for precise cutting.
Ruby gets its characteristic red color from trace amounts of chromium.
Sapphires are closely related to rubies, but their color shades are influenced by different trace elements.
Why rubies are popular
Red Glow
Rubies exhibit strong red fluorescence, which makes them shine even more intensely in sunlight and gives them a vivid, vibrant color that adds to their unmistakable charm.
Use in Jewelry
After diamonds, ruby is the second hardest mineral in the world, which makes it a favorite among gemstone cutters and jewelers. Its durability makes it ideal for creating long-lasting and luxurious jewelry.
Presence of Chromium
Ruby Quality Factors
High-quality rubies weighing more than 1 carat are very rare, and their price increases proportionally with the size of the gemstone.
The color of a ruby is the most important factor determining its quality, value, and overall appearance.
Inclusions in ruby affect its transparency and brilliance, which can influence the gemstone’s value.
Rubies are often cut into various imaginative shapes using mixed cutting styles that highlight both their color and natural brilliance.
The most important factor when evaluating the quality of a ruby is its color tone. Ruby colors range from light red to deep crimson, with the most desirable shade known as “pigeon blood red.”
For lighter shades of ruby, experts sometimes debate whether the stone should still be classified as ruby or rather as a pink sapphire.
Rubies naturally contain internal inclusions that can influence their value. Unlike diamonds, however, slight inclusions do not necessarily reduce their beauty.
If inclusions are formed by rutile needles, they can create a desirable silky sheen. Rare rubies can also display star effects or even the cat’s eye effect.
However, stones with too many inclusions lose value, while completely clean rubies are among the rarest and most valuable gemstones.
Ruby has a hardness of 9 on the Mohs scale, which makes it one of the hardest gemstones in the world. Because of this, gem cutters can shape it into almost any form.
If the gemstone contains optical effects such as asterism (star effect) or cat’s eye, it is most often cut into an oval cabochon shape, which highlights these phenomena and enhances the gemstone’s beauty.
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