The 4Cs of Diamond Quality: Cut, Color, Clarity & Carat
Every diamond's quality and price is determined by four key factors, known as the 4Cs. Understanding them helps you choose a stone that looks stunning and fits your budget — without paying for grades you can't see with the naked eye.
1. Cut — The Most Important Factor
Cut refers to how well a diamond's facets interact with light. A well-cut diamond reflects light beautifully, creating maximum brilliance and sparkle — regardless of its color or clarity grade. A poorly cut diamond can look dull even with a high color and clarity grade.
Our recommendation: Always prioritize Very Good or above for the best balance of brilliance and value.
2. Color — Grading Scale D to Z
Diamond color is graded on a scale from D (completely colorless) to Z (visibly yellow or brown). The less color a diamond has, the more light can pass through it, creating more sparkle.
Our recommendation: F/G color (like our default selection) offers a near-colorless, icy-white appearance at excellent value — the difference from a D is virtually invisible to the naked eye.
3. Clarity — Grading Scale FL to I3
Clarity measures the presence of internal inclusions or external blemishes. Most inclusions are microscopic and invisible without 10x magnification.
Our recommendation: SI1 clarity (our standard) is "eye-clean" — meaning no inclusions are visible to the naked eye — while costing significantly less than VVS or FL grades.
4. Carat — Weight, Not Size
Carat measures a diamond's weight, not its physical dimensions. One carat equals 200 milligrams. Two diamonds of the same carat weight can look different in size depending on their cut proportions.
| Carat Weight | Approx. Diameter (Round Cut) |
|---|---|
| 0.50 ct | 5.0 mm |
| 1.00 ct | 6.4 mm |
| 1.50 ct | 7.4 mm |
| 2.00 ct | 8.1 mm |
| 3.00 ct | 9.3 mm |
| 4.00 ct | 10.2 mm |
| 5.00 ct | 11.0 mm |
Which C Matters Most?
If you need to prioritize, focus your budget in this order: Cut first, then Color, then Clarity, then Carat. A well-cut, eye-clean, near-colorless diamond will always look more brilliant than a larger diamond with a poor cut — no matter how many carats it weighs.