Sapphire colours: the complete shade guide
François Deprez5/8/2026
Sapphire or Diamond for Your Ring? | Bonnot Paris
Marie
April 29, 2026
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5 min read
Bonnot Paris · Engagement Ring Guide 2026
Sapphire or Diamond: which to choose for your engagement ring?
An honest comparison by our precious stone experts — to help you make the choice that truly reflects you, free from commercial bias.
Every year, thousands of couples ask themselves the same question: should they choose the diamond, the ultimate safe bet, or the sapphire, which is winning ever more hearts for its colour, its character and its price?
As specialists in coloured stones — and the only French house to hold ICA membership (International Coloured Gemstone Association) — we guide clients through this very choice every week. Here is our honest answer, free from commercial bias.
01
At a glance
Two stones, two personalities
The coloured choice
The Sapphire
For those who want a unique, colourful ring that stands apart. More accessible at equivalent quality, exceptionally durable (hardness 9/10), and made iconic by Diana and then Kate Middleton. The choice for those who embrace originality.
The classic choice
The Diamond
For those who love absolute brilliance, tradition and timelessness. The most radiant of stones, complementing everything, carrying a symbolism of eternity universally recognised. The choice that never goes out of style.
Our position
There is no wrong choice. There is your choice, the one that suits her personality. This guide will give you everything you need to decide with confidence — without us steering you towards one stone or the other.
02
Detailed comparison
The 6 criteria that make the difference
| Criterion | Sapphire | Diamond |
|---|---|---|
| Hardness | 9 / 10 Mohs — Ideal for everyday wear | 10 / 10 Mohs — The hardest of all stones |
| Price (1 ct, fine quality) | €1,500 – €8,000 depending on colour and origin | €4,000 – €20,000 depending on the 4Cs |
| Colour range | Unlimited — blue, teal, pink, yellow, padparadscha… | Predominantly white. Fancy colours are extremely rare and costly. |
| Individuality | High — every stone is unique in colour and character | Standardised — quality criteria are highly codified (4Cs) |
| Care | Lukewarm water and a soft brush — simple and effective | Resists knocks and heat well — easy to maintain |
| Symbolism | Wisdom, fidelity, royalty — Diana, Kate Middleton… | Eternal love, purity — a universally recognised symbol |
03
The sapphire in detail
Why the sapphire is winning ever more admirers
With a hardness of 9/10 on the Mohs scale, the sapphire is one of the most resilient stones in existence. It will not scratch on contact with everyday objects, withstands knocks and has no fear of moisture. For a ring worn 365 days a year, that is a decisive quality.
01
Exceptional durability
Hardness 9/10 — only the diamond is harder. Sapphire rings from the 19th century remain as beautiful today as the day they were made.
02
Accessible price
For the same budget, you will generally obtain a more striking sapphire than a diamond. The effect of mass marketing since 1950 weighs heavily on the price of diamonds.
03
Absolute uniqueness
Every sapphire is unique in its colour, inclusions and origin. Your ring will be the only one of its kind in the world — impossible to replicate.
04
The Diana effect
Princess Diana's ring, later worn by Kate Middleton, reignited worldwide enthusiasm for sapphires. The stone is now seen as a royal and refined choice.
Are you considering a blue sapphire engagement ring? Discover our collection of bespoke creations, built around certified stones sourced directly in Sri Lanka.
The Bonnot Paris expertise
The only French house that is a member of the ICA, we source our sapphires directly in Sri Lanka, Bangkok and Jaipur — with no intermediaries. Every stone is accompanied by a laboratory certificate (GRS, GIA or Gübelin) attesting to its authenticity, origin and precise characteristics.
04
The sapphire palette
Far more than blue: every colour of sapphire
The sapphire is far more than the classic blue. It exists in an extraordinary palette, each colour with its own origin, symbolism and personality.
Blue Sapphire
The benchmark · Sri Lanka
The world benchmark. Deep blue with velvety reflections, the Ceylon blue sapphire is the stone of Princess Diana. Cornflower blue to royal blue — the most sought-after colour.
Teal Sapphire
2026 Trend · Madagascar
A chameleon blue-green — the defining stone of 2026. Its hue shifts with the light: a deep blue indoors, a rich teal in sunlight. Modern, rare and unforgettable.
Pink Sapphire
Romantic · Sri Lanka
Romantic and delicate, the pink sapphire is the elegant alternative to ruby. From pale peach to deep fuchsia — for personalities that are both feminine and bold.
Padparadscha
The Holy Grail · Ultra-rare
A sunset pink-orange — the padparadscha is the rarest and most precious of all sapphires. The only one to bear its own proper name. The collector's ultimate prize.
Yellow Sapphire
Radiant · Often underestimated
Luminous and sun-drenched, the yellow sapphire is often underestimated — quite wrongly. From pale lemon to rich gold, it flatters every complexion and every gold setting.
05
The diamond in detail
What the diamond offers that the sapphire cannot
Let us be honest: the diamond has genuine qualities that the sapphire simply cannot replicate. Here is why it remains the world's number-one choice.
01
Its singular brilliance
Its exceptional refractive index produces a brightness and a "fire" — those coloured flashes of light — that no other stone can replicate in quite the same way.
02
Universal symbolism
Understood and recognised across every culture as the symbol of eternal love. A diamond ring can never be misread.
03
Complete versatility
A white diamond suits every outfit and every style — from an easy everyday look to a formal evening — without ever striking a wrong note.
04
Unmatched hardness
The only stone to score 10/10 on the Mohs scale — the hardest of all natural materials. Nothing in nature surpasses the diamond's resistance to wear.
If your partner dreams of a ring that truly dazzles, favours the classic and the timeless, or holds the traditional symbolism of an engagement dear — the diamond remains unrivalled. It is not a default choice; it is a deliberate one.
06
Budget compared
What you can have for your budget
Budget is often the deciding factor. Here is what you can realistically expect for a sapphire versus a diamond at each price point.
3 000 €
Entry budget
Entry budget
Sapphire: 0.8–1.2 ct certified, beautiful colour, 18ct gold setting. A striking result.
Diamond: 0.4–0.5 ct in decent quality (G/VS). A more understated result.
6 000 €
Mid-range budget
Mid-range budget
Sapphire: Ceylon 1.5–2 ct AAA quality, GRS certificate. An exceptional stone.
Diamond: 0.7–0.9 ct in good quality (F/VS1). A very fine result.
12 000 €
Premium budget
Premium budget
Sapphire: Royal Blue 2.5–4 ct, Gübelin certificate. High jewellery.
Diamond: 1.2–1.5 ct in excellent quality (E/VVS). A remarkable ring.
The Bonnot Paris approach
Through our direct sourcing without intermediaries from Sri Lanka, Bangkok and Jaipur, you pay the true price of the stone — not a distributor's margins. For an equivalent budget, you gain access to a quality that is generally superior to what traditional retailers offer.
07
Our advice
Which profile are you?
After hundreds of projects guided to completion, here are the profiles we encounter most often. Do you recognise your partner?
Choose the sapphire
If she loves to stand out
- She is looking for a ring that tells a story
- Colour matters as much as brilliance
- She has a confident, distinctive style
- You want to make the most of your budget
- She prefers the unique over the standardised
- She loves jewellery with a provenance
Choose the diamond
If she prefers the classic
- She values brilliance and sparkle above all
- The timeless and the classic appeal to her
- Family tradition carries weight
- She wants a ring that goes with everything
- She has clearly expressed this preference
- You are investing with heritage value in mind
08
Frequently asked questions
Everything you are wondering about this choice
Is a sapphire as durable as a diamond for an engagement ring?
The sapphire scores 9/10 on the Mohs hardness scale, just behind the diamond (10/10). This difference is imperceptible in everyday wear. Sapphire rings worn since the 19th century stand as testament to this exceptional durability — and remain as beautiful as ever.
Why is a sapphire less expensive than a diamond?
The difference is largely explained by the vast marketing campaigns around diamonds since the 1950s ("A Diamond is Forever"). The intrinsic value of a fine certified sapphire is considerable, yet its market price remains more accessible.
What colour of sapphire should I choose for an engagement ring?
It all depends on your partner's personality. The blue sapphire is the classic choice — discover our blue sapphire engagement rings. The teal sapphire is the trend for 2026. The pink sapphire suits the romantics. The padparadscha is for those who seek the rare. The best way to choose remains seeing them in person at an appointment with Bonnot Paris.
Is a diamond a better investment than a sapphire?
High-quality sapphires — particularly GRS-certified Ceylon blues or padparadscha — appreciate very well over time. Long-term value depends far more on quality, origin and certification than on the type of stone. An exceptional Royal Blue sapphire can outperform many standard diamonds in terms of appreciation.
Ready to choose your stone?
Meet François Deprez to explore our selection of exceptional sapphires and diamonds, sourced directly with no intermediaries.
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Marie
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