Journal — jewellery & precious stone guides

Sapphire colours: the complete shade guide

The sapphire shade guide — blue, teal, padparadscha, pink, violet | Bonnot Paris Overview · The Precious Stone Journal 2026 The Sapphire Shade Guide Blue, teal, padparadscha, pink, violet : thirty certified stones, their hue, their character — and the ring that suits each one. By François Deprez, founder · Shade Guide · 8 min · August […]

François DeprezAugust 5, 2026

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Sapphire Engagement Ring: The Bonnot Guide — Budget, Shades & Atelier

Bonnot Paris · The Journal of Precious Stones 2026 Sapphire Engagement Ring: The Bonnot Guide Real budgets, colour selection, the heat-treatment question, settings and the atelier journey — everything we explain week after week at 10 rue de la Paix, brought together in a single guide. By François Deprez, founder · […]

bastienAugust 1, 2026

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Blue Sapphire: The Complete Guide (Meaning, Price & Origin)

Bonnot Paris · The Precious Stone Journal 2026 Blue Sapphire: the complete guide — meaning, price and origin Colour, origins, symbolism, quality and price — everything you need to know before choosing a blue sapphire, by our coloured-stone dealers. By François Deprez, founder · Complete guide · 9 min […]

François DeprezJuly 6, 2026

Teal Sapphire: The Rising Star of Modern Fine Jewellery

Bonnot Paris · The Precious Stone Journal 2026 Teal Sapphire: the rising star of modern fine jewellery Colour, origins, shades, prices — everything you need to know before choosing a blue-green sapphire, by our coloured stone dealers. By François Deprez, founder · Complete guide · 8 min · Updated […]

François DeprezJuly 6, 2026

The Ruby Guide: Origins, Quality, Price & Expert Advice

Bonnot Paris · The Journal of Precious Stones 2026 Ruby: the complete guide — origins, quality, price and expert advice Colour, origins, pigeon's blood, treatments and price per carat — everything you need to know before choosing a ruby, by our coloured-stone dealers. By François Deprez, founder · Guide […]

François DeprezJune 15, 2026

Sapphire or Diamond for Your Ring? | Bonnot Paris

Bonnot Paris · Engagement Ring Guide 2026 Sapphire or Diamond: which should you 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. By François Deprez, founder · Complete guide · 8 min · Updated […]

MarieApril 29, 2026