GemTrove: Ruby Gemstone Guide


The King Of Gems Ruby


Rubies are the gemstone of legends. Myanmar has an infamous valley that is the main of the world’s gems including the illustrious ruby gemstone. In Sanskrit, the ruby is called ‘ratnaraj’ which translates as ‘the king of gems’. 

Ruby gemstones have been referenced throughout the history of mankind. It was even mentioned in the Christian Holy Bible’s Old Testament with a well-known proverb stating “wisdom is more valuable than rubies.”

Now it’s known worldwide as a prestigious and sought out jewellery stone, popular in engagement rings, due to its bold, passionate red shade.

Ruby Gemstone Evaluation

A ruby gemstone’s price value is commonly assessed through the same 4 C grading system of a diamond. The 4 C’s cover the stone’s colour, clarity, cut and carat weight grading.


Rubies are renowned for their vibrant red colour. The red colour of a ruby is its most significant pricing factor. The most expensive and sought after ruby stones are those with a pure red to slightly purple-red colour.

If the shade of red is too dark or too light, it has a negative effect on the stone. A darker colour affects the stone’s brightness, while lighter red colours are reserved for pink sapphire stones. The more the stone leans towards an orange or purple shade, the lower its quality is. Vivid colour saturation is also important for high-valued rubies.


Ruby gemstones without inclusions or blemishes are close to nonexistent. However, surface or internal marks don’t instantly reduce the value of the gemstone. A ruby’s clarity grading charts how visible these inclusions are.

To accurately grade a stone’s clarity it is put through a microscopic lens. Any marks visible to the naked eye will dramatically lower a ruby gemstone’s value. Prominent inclusions can also diminish the transparency and brilliance of the stone, therefore affecting its overall price value.


The cut of a ruby influences its overall beauty and value. A ruby gemstone’s cut can affect the way light interacts with the stone. Ruby needs to be cut deep enough to accommodate for the light refraction, but also not too deep the light escapes through the sides or bottom.

A quality cut can also help alleviate the appearance of inclusions and blemishes. The combination of maximising brilliance potential and reducing surface marks determine the overall cut grading of a ruby.

Carat Weight

The average carat weight of a ruby depends on its shape and size. For instance, a round 3.0mm ruby will have an average of 0.15 ct while an oval shape ruby that’s 5x3mm will have an approximate 0.29 ct.

Size is an important factor that influences carat weight because rubies require precise cutting and dimensions to maximise its value. Regarding carat weight, It is very rare to find a fine-quality ruby over 1 ct. The scarcity of finding the stone makes the price spike the larger and heavier it is.

Discover Our Vast Collection Of Extravagant Ruby Jewellery

View our array of stunning ruby jewellery. At GemTrove we have a carefully curated showroom and online store that displays all our luxury ruby items. From ruby engagement rings to ruby earrings, visit our flagship store or see our online collection today

For more information about ruby characteristics, pricing guide and buying tips get in touch with one of our friendly consultants. We’re happy to share our passion for jewellery with you.

Browse our selection of ruby rings, ruby necklaces and other luxury items online or instore.

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