When one thinks of a sapphire, the most common image that comes to mind is that of a deep, elegant and mysterious blue stone. However, the sapphire universe goes far beyond the classic blue. The colour of sapphire encompasses an astonishing palette of shades including pink, yellow, green, orange, purple and even colourless. This chromatic diversity not only makes the sapphire a fascinating gemstone, but also influences its rarity, value and aesthetic appeal.
Throughout history, the sapphire has been a symbol of wisdom, nobility and protection. Its value has been associated not only with its hardness - it is the second hardest gemstone after diamond - but also with the intensity and purity of its colour. To fully understand the colour of sapphire, In the case of the latter, it is necessary to explore their origin, the factors that determine their shades, and the most prominent types according to their colouring.
What is a sapphire made of?
Sapphire is a variety of the mineral corundum, composed mainly of aluminium oxide (Al₂O₃). In its purest state, corundum is colourless. However, the presence of traces of other chemical elements such as iron, titanium, chromium or vanadium creates the various colours found in sapphires. Each combination of these elements traces a unique geological history, determining not only the colour, but also the intensity and saturation of each gemstone.
Blue sapphire: the timeless classic
Blue sapphire is undoubtedly the most iconic and sought-after sapphire. Its colour is mainly due to the presence of iron and titanium. Shades can vary from a very light blue to a deep, intense blue, almost black. The sapphires The most highly prized colours tend to be medium to dark blue with strong saturation and excellent transparency.
Royal blue sapphireDeep, intense and uniform blue. Highly prized in fine jewellery.
Maize blue or light blue sapphire: Light and soft blue, more accessible but equally beautiful.
Blue sapphire with veils or inclusionsAlthough less sought after, they can have a charm of their own, especially in handcrafted or bohemian pieces.
Pink sapphire: femininity and romanticism
The pink sapphires owe their colour to the chrome, The same element that gives the ruby its characteristic red. In fact, ruby and sapphire are technically the same stone: corundum. The difference is in the amount of chromium present.
Pink sapphires can range from soft pastels to deep, vivid pinks. They are popular in engagement rings because of their romantic and feminine feel. The more intense and pure the shade, the higher the value.
Yellow sapphire: joy and warmth
This colour is formed by the presence of iron in different concentrations. The yellow sapphires can range in shade from pale lemon yellow to deep golden, and even have greenish tints.
Although they are not as common as blues, their growing popularity is due to their cheerful and modern look, ideal for those looking for an unconventional piece of jewellery.
Sapphire orange: the contained fire
One of the most unusual and sought-after colours is the orange. It is obtained when the corundum contains both iron as chrome. In this range, the Padparadscha sapphires -of a delicate pink-orange hue- are particularly prized and extremely rare. Originally from Sri Lanka, their name means “lotus flower” in Sinhalese, evoking their unique colour.
Highly saturated orange sapphires are rare and often expensive, especially when they have good transparency and brilliance.
Green sapphire: balance and rarity
Green sapphires are formed by the combination of iron with small amounts of chrome o vanadium. Although they have historically been less appreciated, they have now gained prominence thanks to their organic tone and versatility in fine jewellery designs.
Shades can range from olive green to forest green to yellowish green. The more balanced the colour, without yellow or brown dominance, the more attractive it is.
Purple and violet sapphire: the mystical jewel
Purple sapphires owe their colour to trace amounts of vanadium. These stones can range from soft lilac tones to deep purple with hints of red. They are elegant, mystical gems and less common than other colours, making them especially desirable for unique design pieces.
Colourless sapphire: crystalline purity
Also known as leucozafiros, colourless sapphires are corundum without impurities. Although they may appear plain, they have a serene and luminous beauty, and are an ideal choice for those seeking the durability of sapphire with a diamond-like appearance.
They are also used in the industry as substitutes for diamonds in high-end watchmaking and minimalist jewellery.
Colour changing sapphires: an optical marvel
Some sapphires exhibit an unusual property: the change of colour depending on the type of light. They can appear blue under natural light and change to purple or greyish tones under artificial incandescent light. This optical phenomenon is due to the internal structure of the crystal and how it interacts with different wavelengths.
They are highly valued gems because of their rarity and the unique visual experience they offer.
The colour of sapphire is a universe in itself, full of symbolism, science and natural beauty. Although blue remains the quintessential shade, today coloured sapphires have earned an important place in fine jewellery thanks to their variety, originality and sophistication.
From delicate pink sapphires to exotic Padparadscha, from enigmatic green to sophisticated purple, each shade has its own personality. This richness of colour makes the sapphire a stone capable of reflecting the wearer's individuality.
