Sapphire Gemstones: The Crown Jewel of the Corundum Family
In the world of gemmology, the sapphire stands as a titan. Belonging to the corundum mineral family, this extraordinary coloured gemstone boasts a hardness of 9 on the Mohs scale, making it second only to the diamond in durability. This exceptional toughness, combined with a sparkling vitreous lustre, makes it an ideal gem for heirloom pieces designed for daily wear. While many associate the name strictly with the colour blue, the corundum family actually encompasses a breathtaking rainbow of hues. In certain cases, fine-quality unheated stones are significantly rarer and more valuable than colourless diamonds.
Complete Guide to Sapphire Gemstones
A Spectrum of Colours: Beyond the Classic Blue
Generally in the gemstone trade, sapphires without any kind of colour prefix refer to the blue varieties of corundum minerals. However, a sapphire can incorporate almost all gem colours, excluding ruby and red varieties. From vibrant yellows and pinks to stunning greens, you can rest assured that you will be spoilt for choice.
Expert Note: If you are specifically looking to explore deep blue hues (like Royal or Cornflower), pricing, and custom settings for a proposal piece, we highly recommend reading our dedicated master guide to the blue sapphire ring.
Heat Treatment
It is important to note that approximately 90% of sapphires undergo a process of heating to enhance their overall visual appeal. This treatment involves skillfully managing the temperature and timing to achieve the desired colour and clarity. This results in improved saturation and clarity which significantly improves the value of commercial gems. Rubies are also commonly heat treated, whereas emeralds are often oiled to achieve a similar improvement.
Undoubtedly, it is exceedingly uncommon in today’s world to come across a vibrant unheated sapphire with an intense hue and clean clarity. Discovering an unheated sapphire with such vivid shades is an extraordinary occurrence, making it unquestionably a precious gemstone that possesses both heirloom value and potential as an investment piece. It is normal to only see heat-treated sapphire gemstones if you are out shopping for standard blue sapphire jewellery. At GIOIA Fine Jewellery, we are determined to bring you the widest selection of fine quality unheated sapphire gemstones.
Colour diffusion
Colour Diffusion introduces artificial chemicals to enhance a sapphire’s colour. This process is completely unnatural. Pay particular attention to any gemstone certification that has colour diffusion written on it. Even if a gemstone certificate labels the sapphire as ‘natural,’ this only confirms it is not lab-created. At GIOIA Fine Jewellery, we do not accept any gemstone with colour diffusion or lab-grown origins.
Untreated might not guarantee it is unheated; it could be enhanced by other methods. Always consult with your jeweller to understand their definition of ‘untreated’ fully. The artificially enhanced colour may look brilliant and intense, but the gem will often be worthless.
Renowned International Certification
A reputable laboratory certification from GRS Swisslab or GIA (Gemological Institute of America) is important. Locally, there are experienced independent gemological laboratories which certify coloured gemstones. They are equipped with sophisticated technology able to identify various types of heat-treatment. We certainly won’t trust an in-house certification for quality assurance.
Evaluating Investment-Grade Quality
Investing in gem-quality corundum yields diverse returns based on stringent criteria. The value is exponentially influenced by the stone’s colour saturation, its treatment history (with “Unheated” being the gold standard), clarity, carat weight, and geographic origin. Historically, gems hailing from Kashmir command the absolute highest auction premiums, while top-tier modern investments are primarily sourced from the legendary mines of Burma (Myanmar), Sri Lanka (Ceylon), and Madagascar.
The Reality of Sapphire Rough
Finding sapphire rough of exceptional quality is an incredible rarity. Sapphire rough typically forms in uneven colours, with shades ranging from greenish-blue to yellowish or even nearly colourless. Sourcing an unheated sapphire with a consistent, well-balanced colour and clarity—one that showcases exquisite royal or cornflower blue shades—requires immense effort and expertise. Within the narrow 10% category of unheated stones, only a tiny fraction boasts excellent clarity, vivid colour, and proportional cutting.
Colour Change Varieties
Sapphire goes beyond static colours, extending to colour-change varieties that shift from purple to blue and blue to purple. This phenomenon is dictated by different light conditions. Under natural daylight, it may exhibit a mix of blue and purple tones, but change completely under incandescent light.
Padparadscha – The Rarest Sapphire of Them All
With a customised Padparadscha ring, you can capture a beautiful shared love for eternity!
Pronounced “pad-pah-raj-ah”, a Padparadscha combines the best of a pink (symbolising romance and passionate love) and an orange (symbolising an abundance of sunshine and joy). If you’re lucky, you’ll be able to spot a Padparadscha sapphire among ten-to-twenty high-quality blue sapphire gemstones.
A customised Padparadscha sapphire ring’s unforgettably beautiful hue will definitely be the gem of your eye!
Pink and yellow-hued sapphire rings are increasingly popular among our female customers these days. One of the main reasons for this trend is that they are comparatively affordable. Closely comparable to their naturally true-blue, “royal blue” counterparts. Sapphire stones come in different shapes (e.g. round, pear, princess and baguette). Sapphires are incredibly malleable and can also be altered into other shapes and sizes, thanks to its natural excellent hardness. We can have a multi-coloured family birthstone ring and other fine jewelry tailored to meet your personal preferences.
Customised Heirloom Jewellery
Jewellery that complements the outfit you wear and whatever type of event you attend. That will definitely be sapphire, which comes in a different range of colours and shapes. This brilliant gemstone, with a bespoke design setting, is sure to be unique in the crowd. Truly an investment gemstone to cherish for decades, and a piece of heirloom jewellery for generations.
Custom Sapphire Jewellery
Because of their matchless attributes—specifically a Mohs hardness of 9 and an absence of cleavage planes—these gems are uniquely suited to complex, architectural fine jewellery designs. They symbolise loyalty, trust, and enduring commitment, making them a historical favourite for elaborate tiaras, heavy pendants, and intricate brooches. We can even craft a multi-coloured family birthstone ring to meet your personal preferences.
Explore our full collection of multi-coloured sapphire gemstones for Sapphire Engagement Rings.
This exquisite creation centers around an inverted pear-shaped marquise diamond that cascades gracefully into a drop-shaped unheated blue sapphire. Round and marquise diamonds flow seamlessly into the captivating vivid blue sapphire. At GIOIA, we chose this vivid royal blue for its exceptional brilliance and rare origin from Sri Lanka. An elegant pendant design that captures the essence of a love story and cherished memory. A personalised sapphire pendant gift in a single piece of art that is both timeless and avant-garde.
Star sapphires, despite their seemingly hefty carat weight, often look lighter than expected. This is thanks to their cabochon shape, which contrasts with the denser appearance of faceted-cut sapphires. Now that you’ve explored the beauty and significance of sapphires, it’s time to make them a part of your own collection. Visit our boutique to discover our bespoke sapphire jewellery or contact us to create a one-of-a-kind piece just for you.
Frequently Asked Questions
Find answers to commonly asked questions about our sapphire gemstone jewellery.
Is a Sapphire gemstone better than a diamond?
When comparing sapphire gemstones to diamonds, sapphires are certainly much rarer. Over the years, the price of high-quality unheated blue sapphires has increased steadily and sustainably, while the value of diamonds has been declining due to the rise of lab-grown diamonds, which have significantly reduced their market value.
In terms of appearance, sapphires offer a much wider variety of colour options. Even within blue sapphires, there are different shades ranging from royal blue, cornflower blue, and light blue to violetish blue, as well as colour-change sapphires—just to name a few.
Are all unheated sapphires pastel or light in colour?
Certainly not. While heat treatment is commonly used to enhance the colour saturation of sapphires, unheated sapphires can also display deep, rich hues with excellent saturation and brilliance. These natural, vibrant sapphires are exceptionally rare, making them highly sought after by collectors and jewellers for their untouched beauty.
Does carat weight matter for sapphire gemstones?
While carat weight is an important factor in the overall size of the sapphire, it doesn’t always determine the stone’s value. Especially when it comes to value retention, the quality of the sapphire—such as its colour, clarity, and whether it’s heated or unheated—plays a much more important role.
A smaller sapphire with exceptional colour and clarity can often be more valuable than a larger stone of lower quality. In fact, sapphires with vivid, natural colours and no treatments tend to be more sought after and hold their value better over time.
Difference between carat weight and size in Sapphire vs Diamond?
Sapphire and diamond of the same carat weight can appear different in size as sapphire is much denser. Carat weight measures a gemstone’s mass, while size refers to its physical dimensions. At the same time a deep-cut gemstone may look smaller than a shallow-cut one of the same carat weight, so it’s important to consider both factors when evaluating a stone.
How can you tell if a sapphire gemstone is real?
With a magnifying glass, we can pick up natural inclusions (feathers, needles, crystal or colour zoning) as natural sapphires often have tiny imperfections. From the colour shade and reflection, we can also identify whether it’s natural.
However, we strongly recommend getting the gemstone certified by an independent gemologist laboratory.
Where to find Sapphire Gemstone?
At GIOIA Fine Jewellery, we offer an exceptional range of sapphire gemstones, from the sought-after Ceylon sapphires to the majestic royal blue and fancy coloured sapphires. As a leading gemstone specialist, all our sapphires are certified by renowned gemological labs like GRS, GIA or NGI, ensuring their authenticity and exceptional quality. Visit us today to discover our premium collection of sapphire gemstones.
Have a question on sapphire gemstone?
If you have any other queries, feel free to reach out to us. Our GIOIA team is here to help!
