• Carat


    Diamond carat is a measure of weight, not size. One carat equals 0.2 grams. While often confused with dimensions, carat weight is simply how heavy the diamond is—its visual size depends on cut and shape.


    Larger diamonds are rarer, which makes them more valuable. However, carat weight alone does not define beauty. A smaller diamond with an excellent cut can appear more brilliant than a heavier, poorly cut stone.


    Carat weight tips:

    • Prices rise exponentially with carat weight—doubling size can mean 3–4× the price.

    • Buying just under “magic sizes” (like 1.0ct, 1.5ct, 2.0ct) can offer savings of 10–20%, with little visible difference.

    • Elongated shapes such as oval, pear, or marquise can appear larger than round diamonds of the same weight.


    At À Vie, the average engagement diamond we sell is around 0.80–1.20ct. Many clients choose slightly below milestone weights for better value while still achieving a striking look.


    "Carat weight is about balance. Bigger isn’t always better, what matters most is finding the perfect harmony of size, brilliance, and budget."

    — À Vie Gemmology Team

Estimated Dimensions

Diamond carat weight directly affects how large a stone looks, but size also depends on shape and cut. Use this chart to compare different carat weights across popular diamond shapes and see how they measure in millimetres.

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Diamond Carat Weight Grading by GIA

Explore the beauty and science of diamond craftsmanship in this video. Learn how expert cutters balance proportions and light to create sparkle — from brilliance and fire to scintillation. Perfect for anyone curious about what makes a diamond truly shine, or who wants to feel confident choosing the right stone.

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