Rubies are formed under the earth's surface, hosted in metamorphic rocks such as marble or igneous rocks like basalt rock. Marbles' low iron content results in an intense red colour in the rubies, making them more desirable and valuable.
Rubies can command the highest per-carat price of any coloured stone! We have put together this sheet to help explain everything you need to consider when purchasing a Ruby.
All gemstones are graded using the combination of these characteristics to assess their value and are priced at the US dollar rate of the day. This means that our quotations are time-sensitive and subject to change.
Rubies are the birthstone for the month of July and mark the gift for the 15th and 40th wedding anniversaries.
This is purely dependent on personal preference and design aesthetic! Secondly, the cut grade of a ruby refers to how well it has been cut and depends on things like symmetry and proportions, as well as the quality of faceting and polish.
For us, this is perhaps the most important thing to consider when looking at gemstones to buy, as you want one that delivers a maximum return of colour & light.
This plays a vital role when cutting the stone. A well-cut ruby has minimal orangy-red hues and the desirable highlighted grape red shades - therefore, increasing its value.
A top-quality ruby with a poor Cut Grade could have emphasized orangy-red colours which would decrease the value of the stone, even though it might have a high carat weight.
We only consider rubies with Very Good and Good Cut Grade for our clients, to ensure you are getting the best quality.
Inclusions can consist of tiny crystals that are trapped while the stone is formed or irregularities in the atomic structure.
The clarity grade of a ruby refers to the presence and visibility of inclusions in the stone. Top quality rubies without inclusions are more desirable and extremely rare. Obvious fissures or inclusions that reduce transparency or brightness lower a ruby’s value dramatically as this results in a more dull red colour.
Significant surface-reaching fractures can pose durability threats and lower the price of the ruby. Some inclusions actually contribute positively to a ruby’s appearance.
The presence of rutile silk causes light to scatter across facets that might otherwise be too dark. This adds softness to the colour and spreads the colour more evenly across the ruby’s crown. The same applies to needle inclusions that intersect and cause the star effect, called asterism, when the stone is cut with a curved upper surface, called a cabochon cut.
Below are images of the most common inclusions found in rubies:
Crystals Needles Silk
It is important to note that inclusions need not be seen as a negative characteristic unless they affect the overall beauty of the stone.
Inclusions are what make your stone unique, and are also evidence of mineral formations from billions of years ago, proving that it is natural.
The finest ruby has a pure, vibrant red to slightly purplish grape red colour. The pure red colours with vivid colour saturation command the highest prices and rubies with overtones of orange and purple are less costly.
If the colour is too dark, it affects the stone’s brightness negatively. At the other extreme, if the colour is too light, the stone may be considered to be a pink sapphire, even if colour strength or intensity is high.
Historically, the term “pigeon’s blood” described the red to slightly purple colour of rubies with a soft, glowing, red fluorescence.
The most vital aspect when choosing a gemstone is choosing the one that appeals to you the most, and depends largely on personal preference.
The value of a ruby increases with its carat weight, as it gets bigger (and heavier).
Fine-quality rubies that weigh over one carat are very rare, but commercial-quality rubies which may be slightly included are commonly available in a wide range of sizes. The price per carat for a fine quality ruby goes up significantly as it increases in size.
However, it is worth noting that a high-quality ruby with a lower carat weight can hold more value than a big ruby with a higher carat weight but lower quality due to factors like cut or colour.
Bonus 'C' - Characteristic
We believe in each stone having an appeal that is not necessarily included in the four C’s, and this is why it is very important to view a few options before purchasing.
We are focused on finding the right ruby, for YOU.
We will, however, always test the stones brought into our studio before accepting them, to determine whether they are genuine.
Caring for your Rubies
Therefore, we always recommend that you take extra special care of your ruby jewellery to ensure its signature sparkle.
- Avoid exposure to any harsh chemicals
- Avoid wearing your jewels while swimming, hiking, washing dishes, gyming , or any activities where they are at risk of being knocked or scratched.
- Always clean your pieces with warm soapy water and a soft toothbrush. For any specific cleaning measures, we will make recommendations or ask you to visit the studio.
- Store your pieces somewhere SECURE, in its box, apart from other jewels which may cut or scratch them.
- Bring your piece to the studio once a year for us to give it a proper professional clean and inspect it for any traumas or weakness in the settings.
Below are some examples of Ruby pieces we have made in our studio: