Carat Measures Weight, Millimeters Measure Size
Two diamonds that each weigh exactly 1.50 carats may have noticeably different visible face-up sizes. The visible surface area of a diamond is determined by its millimeter dimensions (length × width), while carat measures only mass.
If a diamond is cut too deep (depth percentage over 65%), significant weight is hidden in the pavilion beneath the girdle where it does not contribute to the face-up spread. Conversely, if a stone is cut too shallow, it may spread wide but suffer from light leakage, creating a dull, lifeless center.
How Different Shapes Distribute Carat Weight
Due to geometric outline dynamics, elongated shapes appear significantly larger than round stones of the same carat weight:
• Oval and Marquise diamonds feature elongated profiles that cover more finger length, typically appearing 10–15% larger face-up than a round diamond of equivalent carat weight.
• Emerald cuts distribute weight into step facets, offering a sophisticated window-like presence.
• Princess and Asscher cuts tend to carry more weight in the corners and pavilion depth, resulting in a slightly more compact face-up millimeter footprint per carat.
How to Check Dimensions When Shortlisting
When comparing diamonds in our catalog:
1. Always look at the Measurements row: Compare length and width in millimeters directly.
2. Check the Depth Percentage: Look for balanced depth percentages (typically 59% to 62.5% for rounds, 60% to 68% for fancy shapes).
3. Review Length-to-Width Ratio: Ensure the elongation matches your finger aesthetic preferences.
4. Ask for Guidance: Send the SKU to our diamond specialist on WhatsApp for a side-by-side dimensional comparison.