How can you recognise a precious stone?Bonnot Paris · The Precious Stones Journal 2026 How can you recognise a precious stone? What the term means in France, what you can genuinely observe for yourself, and the four misconceptions that fool everyone — including royal crowns for centuries. By François Deprez, founder · Gemmology · 8 min […]Bonnot Paris•April 29, 2026
How to recognise a diamondBonnot Paris · The Precious Stone Journal 2026 How to recognise a diamond The fog test proves nothing, nor does the water test, and the scratch test damages your jewellery. What can truly be observed—and what requires laboratory testing. By François Deprez, founder · Gemmology · 8 min […]Bonnot Paris•April 29, 2026
The Steps of Making a RingBonnot Paris · The Precious Stone Journal 2026 The Manufacturing Steps Six stages, from the first conversation to delivery. What each one determines, how long it takes — and the point after which nothing can be changed. By François Deprez, founder · The workshop · 9 min · September 2026 Contents […]Bonnot Paris•April 29, 2026
The Evolution of Bespoke Ring TrendsBonnot Paris · The Journal of Precious Stones 2026 The evolution of trends The white solitaire is only seventy-five years old. What has changed in bespoke ring commissions, colour by colour — and what will never go out of style. By François Deprez, founder · Trends · 9 min · September 2026 Contents […]Bonnot Paris•April 29, 2026
A guide to choosing the right engagement ringBonnot Paris · The Journal of Precious Stones 2026 Choosing the right ring: seven mistakes It is not poor choices that prove costly, but decisions made in the wrong order — or too late. The seven we see most often. By François Deprez, founder · Guide · 9 […]Bonnot Paris•April 29, 2026
The Sapphire GuideBonnot Paris · The Journal of Precious Stones 2026 The sapphire ring guide Colour, shape, setting, metal, budget. Everything to decide before drawing — and an honest comparison with ruby and emerald. By François Deprez, founder · Guide · 9 min · September 2026 […]François Deprez•April 29, 2026
