How to Choose Your Diamond ?
At Amantys Joaillerie, each diamond is selected with great care and comes with a recognised certification. Guided by the 4Cs – Carat, Colour, Clarity and Cut – our gemmologists help you choose a stone that reflects your emotions and your story.

The Four Essential
Characteristics of a Diamond

The four fundamental criteria – Cut, Colour, Clarity, and Carat, form the universal basis for diamond analysis.
Each stone is precisely graded on these aspects, allowing for an objective assessment of its value. The worldwide standardisation of diamond grading was established through a strategic collaboration between De Beers and the GIA in the 1940s, marking a decisive moment in the history of gemmology.

Understanding the 4Cs of a Natural Diamond

Carat

One carat equals 0.2 grams, a measurement of weight, not necessarily visible size.
The relationship between carat weight and visual size is non-linear: a 1-carat diamond appears only about 25% larger than a 0.5-carat stone, despite being twice as heavy.
This makes it the costliest of the 4Cs.

Clarity

Assessing a diamond’s natural inclusions requires advanced expertise and specialised tools.
Gemmologists use a 10x magnifying loupe to examine each stone carefully from multiple angles.

Colour

The GIA colour scale ranges from D (exceptional white) to Z (noticeable yellow tint), comprising 23 subtle grades.
This precise system enables a detailed evaluation of each stone’s tone.

Cut

Cut determines a diamond’s brilliance. An “Excellent” cut ensures optimal sparkle and light performance.
The classic round brilliant cut, with its 57 expertly arranged facets, remains the most iconic, designed to maximise light reflection and achieve unparalleled brilliance.

Balancing the 4Cs: Finding the Right Harmony
Prioritise an ideal cut to maximise brilliance. A slight compromise on clarity (VS2) or colour (G–H) is often imperceptible to the naked eye — yet allows you to select a larger stone.
For example, a well-cut 0.80ct G–VS2 diamond will often appear more brilliant than a poorly proportioned 0.60ct D–VVS1 stone.
Brilliance should always come first.
Our Gemmologists are here to guide you. Whether you’re selecting a diamond for an engagement ring, a birthstone gift, or a bespoke creation, our expert gemmologists help you find the one that truly reflects your story.
Certified Traceability
Certified Traceability

All of our diamonds are GIA-certified — the world’s most rigorous gem certification laboratory.
Each diamond carries a unique laser-engraved identification number on its girdle, matching the number on your certificate.

Discover the science of diamonds
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Ethical and Eco-Responsible Sourcing
Ethical and Eco-Responsible Sourcing

The GIA works with brilliant diamonds sourced from mines that meet the strict ethical standards of the Kimberley Process.
Diamonds form deep within the Earth’s mantle, around 190 kilometres below the surface. Those we select are extracted with full respect for both people and the environment.

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Free Introduction to Diamonds
Offered to all, Amantys’ gemmology introduction is a complimentary session designed to help you understand the fundamentals of diamonds. To make the right choice, you must understand which characteristics impact price the most, and how to find the best balance.

The Choice of Natural Diamonds

Maison Amantys has chosen to work exclusively with natural diamonds sourced from ethical mines. Each of our suppliers adheres to an eco-responsible charter that ensures careful, respectful extraction, for both people and the planet.
Jewellery Crafted with Ethical Diamonds